Changes with nginx 0.8.0 02 Jun 2009v0.8.0

    *) Feature: the "keepalive_requests" directive.

    *) Feature: the "limit_rate_after" directive.
       Thanks to Ivan Debnar.

    *) Bugfix: XLST filter did not work in subrequests.

    *) Bugfix: in relative paths handling in nginx/Windows.

    *) Bugfix: in proxy_store, fastcgi_store, proxy_cache, and
       fastcgi_cache in nginx/Windows.

    *) Bugfix: in memory allocation error handling.
       Thanks to Maxim Dounin and Kirill A. Korinskiy.

67 files changed, 629 insertions, 363 deletions

diff --git a/CHANGES b/CHANGES
index 22aae44d8..3f2ae5259 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,22 @@
 
+Changes with nginx 0.8.0                                         02 Jun 2009
+
+    *) Feature: the "keepalive_requests" directive.
+
+    *) Feature: the "limit_rate_after" directive.
+       Thanks to Ivan Debnar.
+
+    *) Bugfix: XLST filter did not work in subrequests.
+
+    *) Bugfix: in relative paths handling in nginx/Windows.
+
+    *) Bugfix: in proxy_store, fastcgi_store, proxy_cache, and 
+       fastcgi_cache in nginx/Windows.
+
+    *) Bugfix: in memory allocation error handling.
+       Thanks to Maxim Dounin and Kirill A. Korinskiy.
+
+
 Changes with nginx 0.7.59                                        25 May 2009
 
     *) Feature: the "proxy_cache_methods" and "fastcgi_cache_methods" 
diff --git a/CHANGES.ru b/CHANGES.ru
index 8b9e6a441..673a71cba 100644
--- a/CHANGES.ru
+++ b/CHANGES.ru
@@ -1,4 +1,22 @@
 
+Изменения в nginx 0.8.0                                           02.06.2009
+
+    *) Добавление: директива keepalive_requests.
+
+    *) Добавление: директива limit_rate_after.
+       Спасибо Ivan Debnar.
+
+    *) Исправление: XSLT-фильтр не работал в подзапросах.
+
+    *) Исправление: обработке относительных путей в in nginx/Windows.
+
+    *) Исправление: в proxy_store, fastcgi_store, proxy_cache и 
+       fastcgi_cache в nginx/Windows.
+
+    *) Исправление: в обработке ошибок выделения памяти.
+       Спасибо Максиму Дунину и Кириллу Коринскому.
+
+
 Изменения в nginx 0.7.59                                          25.05.2009
 
     *) Добавление: директивы proxy_cache_methods и fastcgi_cache_methods.
diff --git a/auto/cc/msvc b/auto/cc/msvc
index 11c4682cf..01d6f7f2f 100644
--- a/auto/cc/msvc
+++ b/auto/cc/msvc
@@ -125,7 +125,7 @@ ngx_objext="obj"
 ngx_binext=".exe"
 
 ngx_long_start='@<<
-        '
+	'
 ngx_long_end='<<'
 ngx_long_regex_cont=' \
 	'
diff --git a/auto/lib/conf b/auto/lib/conf
index a4155e1ba..f52c90492 100644
--- a/auto/lib/conf
+++ b/auto/lib/conf
@@ -4,15 +4,29 @@
 
 if [ $USE_PCRE = YES -o $PCRE != NONE ]; then
     . auto/lib/pcre/conf
+
+else
+    if [ $USE_PCRE = DISABLED -a $HTTP_REWRITE = YES ]; then
+
+cat << END
+
+$0: error: the HTTP rewrite module requires the PCRE library.
+You can either disable the module by using --without-http_rewrite_module
+option or you have to enable the PCRE support.
+
+END
+        exit 1
+    fi
 fi
 
+
 if [ $USE_OPENSSL = YES ]; then
     . auto/lib/openssl/conf
 fi
 
 if [ $USE_MD5 = YES ]; then
 
-    if [ $OPENSSL != NONE -a $OPENSSL != NO ]; then
+    if [ $USE_OPENSSL = YES ]; then
         have=NGX_HAVE_OPENSSL_MD5_H . auto/have
         have=NGX_OPENSSL_MD5 . auto/have
         MD5=YES
@@ -26,7 +40,7 @@ fi
 
 if [ $USE_SHA1 = YES ]; then
 
-    if [ $OPENSSL != NONE -a $OPENSSL != NO ]; then
+    if [ $USE_OPENSSL = YES ]; then
         have=NGX_HAVE_OPENSSL_SHA1_H . auto/have
         SHA1=YES
         SHA1_LIB=OpenSSL
diff --git a/auto/lib/google-perftools/conf b/auto/lib/google-perftools/conf
index a8987c908..67df9f8ac 100644
--- a/auto/lib/google-perftools/conf
+++ b/auto/lib/google-perftools/conf
@@ -30,4 +30,15 @@ fi
 
 if [ $ngx_found = yes ]; then
     CORE_LIBS="$CORE_LIBS $ngx_feature_libs"
+
+else
+
+cat << END
+
+$0: error: the Google perftool module requires the Google perftools
+library. You can either do not enable the module or install the library.
+
+END
+
+    exit 1
 fi
diff --git a/auto/lib/md5/conf b/auto/lib/md5/conf
index 75dd1300e..d4ef0070e 100644
--- a/auto/lib/md5/conf
+++ b/auto/lib/md5/conf
@@ -94,6 +94,18 @@ else
             CORE_LIBS="$CORE_LIBS $ngx_feature_libs"
             MD5=YES
             MD5_LIB=$ngx_md5_lib
+        else
+
+cat << END
+
+$0: error: the HTTP cache module requires md5 functions
+from OpenSSL library.  You can either disable the module by using
+--without-http_cache option, or install the OpenSSL library into the system,
+or build the OpenSSL library statically from the source with nginx by using
+--with-openssl=<path> option.
+
+END
+            exit 1
         fi
 
     fi
diff --git a/auto/lib/openssl/conf b/auto/lib/openssl/conf
index 8a762a2fc..731db80d7 100644
--- a/auto/lib/openssl/conf
+++ b/auto/lib/openssl/conf
@@ -66,6 +66,17 @@ else
                 have=NGX_SSL . auto/have
                 CORE_LIBS="$CORE_LIBS $ngx_feature_libs $NGX_LIBDL"
                 OPENSSL=YES
+            else
+
+cat << END
+
+$0: error: SSL modules require the OpenSSL library.
+You can either do not enable the modules, or install the OpenSSL library
+into the system, or build the OpenSSL library statically from the source
+with nginx by using --with-openssl=<path> option.
+
+END
+                exit 1
             fi
         ;;
 
diff --git a/auto/lib/openssl/make b/auto/lib/openssl/make
index 6646cb2a4..3c21f436b 100644
--- a/auto/lib/openssl/make
+++ b/auto/lib/openssl/make
@@ -2,11 +2,6 @@
 # Copyright (C) Igor Sysoev
 
 
-case $USE_THREADS in
-    NO) OPENSSL_OPT="$OPENSSL_OPT no-threads" ;;
-    *)  OPENSSL_OPT="$OPENSSL_OPT threads" ;;
-esac
-
 case "$CC" in
 
     cl)
@@ -21,7 +16,7 @@ END
 
     ;;
 
-    cl | bcc32)
+    bcc32)
 
         ngx_opt=`echo "-DOPENSSL=\"$OPENSSL\" -DOPENSSL_OPT=\"$OPENSSL_OPT\"" \
             | sed -e "s/\//$ngx_regex_dirsep/g"`
@@ -45,16 +40,14 @@ END
     ;;
 
     *)
-        case $OPENSSL in
-
-        /*)
-            ngx_prefix="$OPENSSL/openssl"
-        ;;
-
-        *)
-            ngx_prefix="$PWD/$OPENSSL/openssl"
-        ;;
+        case $USE_THREADS in
+            NO) OPENSSL_OPT="$OPENSSL_OPT no-threads" ;;
+            *)  OPENSSL_OPT="$OPENSSL_OPT threads" ;;
+        esac
 
+        case $OPENSSL in
+            /*) ngx_prefix="$OPENSSL/openssl" ;;
+            *)  ngx_prefix="$PWD/$OPENSSL/openssl" ;;
         esac
 
         cat << END                                            >> $NGX_MAKEFILE
diff --git a/auto/lib/pcre/conf b/auto/lib/pcre/conf
index 3a26b858f..71c6fc5f7 100644
--- a/auto/lib/pcre/conf
+++ b/auto/lib/pcre/conf
@@ -161,6 +161,18 @@ else
             CORE_INCS="$CORE_INCS $ngx_feature_path"
             CORE_LIBS="$CORE_LIBS $ngx_feature_libs"
             PCRE=YES
+        else
+
+cat << END
+
+$0: error: the HTTP rewrite module requires the PCRE library.
+You can either disable the module by using --without-http_rewrite_module
+option, or install the PCRE library into the system, or build the PCRE library
+statically from the source with nginx by using --with-pcre=<path> option.
+
+END
+            exit 1
+
         fi
 
     fi
diff --git a/auto/lib/zlib/conf b/auto/lib/zlib/conf
index f033354a4..e44aa3424 100644
--- a/auto/lib/zlib/conf
+++ b/auto/lib/zlib/conf
@@ -57,6 +57,17 @@ else
             CORE_LIBS="$CORE_LIBS $ngx_feature_libs"
             ZLIB=YES
             ngx_found=no
+        else
+
+cat << END
+
+$0: error: the HTTP gzip module requires the zlib library.
+You can either disable the module by using --without-http_gzip_module
+option, or install the zlib library into the system, or build the zlib library
+statically from the source with nginx by using --with-zlib=<path> option.
+
+END
+            exit 1
         fi
     fi
 
diff --git a/auto/summary b/auto/summary
index bcb8bcd12..b0f6b1974 100644
--- a/auto/summary
+++ b/auto/summary
@@ -74,65 +74,6 @@ esac
 echo
 
 
-if [ $HTTP_REWRITE = YES ]; then
-    if [ $USE_PCRE = DISABLED ]; then
-
-cat << END
-$0: error: the HTTP rewrite module requires the PCRE library.
-You can either disable the module by using --without-http_rewrite_module
-option or you have to enable the PCRE support.
-
-END
-        exit 1
-    fi
-
-    if [ $PCRE = NONE -o $PCRE = NO ]; then
-
-cat << END
-$0: error: the HTTP rewrite module requires the PCRE library.
-You can either disable the module by using --without-http_rewrite_module
-option, or install the PCRE library into the system, or build the PCRE library
-statically from the source with nginx by using --with-pcre=<path> option.
-
-END
-
-        exit 1
-    fi
-fi
-
-
-if [ $HTTP_GZIP = YES ]; then
-    if [ $ZLIB = NONE -o $ZLIB = NO ]; then
-
-cat << END
-$0: error: the HTTP gzip module requires the zlib library.
-You can either disable the module by using --without-http_gzip_module
-option, or install the zlib library into the system, or build the zlib library
-statically from the source with nginx by using --with-zlib=<path> option.
-
-END
-
-        exit 1
-    fi
-fi
-
-
-if [ $HTTP_SSL = YES ]; then
-    if [ $OPENSSL = NONE -o $OPENSSL = NO ]; then
-
-cat << END
-$0: error: the HTTP SSL module requires the OpenSSL library.
-You can either do not enable the module, or install the OpenSSL library
-into the system, or build the OpenSSL library statically from the source
-with nginx by using --with-openssl=<path> option.
-
-END
-
-        exit 1
-    fi
-fi
-
-
 cat << END
   nginx path prefix: "$NGX_PREFIX"
   nginx binary file: "$NGX_SBIN_PATH"
diff --git a/src/core/nginx.h b/src/core/nginx.h
index f642321fa..f72a6fbfb 100644
--- a/src/core/nginx.h
+++ b/src/core/nginx.h
@@ -8,8 +8,8 @@
 #define _NGINX_H_INCLUDED_
 
 
-#define nginx_version         7059
-#define NGINX_VERSION      "0.7.59"
+#define nginx_version         8000
+#define NGINX_VERSION      "0.8.0"
 #define NGINX_VER          "nginx/" NGINX_VERSION
 
 #define NGINX_VAR          "NGINX"
diff --git a/src/core/ngx_conf_file.c b/src/core/ngx_conf_file.c
index 1f6b1f732..c58d8095f 100644
--- a/src/core/ngx_conf_file.c
+++ b/src/core/ngx_conf_file.c
@@ -12,6 +12,7 @@
 static ngx_int_t ngx_conf_handler(ngx_conf_t *cf, ngx_int_t last);
 static ngx_int_t ngx_conf_read_token(ngx_conf_t *cf);
 static char *ngx_conf_include(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+static ngx_int_t ngx_conf_test_full_name(ngx_str_t *name);
 static void ngx_conf_flush_files(ngx_cycle_t *cycle);
 
 
@@ -802,29 +803,15 @@ ngx_int_t
 ngx_conf_full_name(ngx_cycle_t *cycle, ngx_str_t *name, ngx_uint_t conf_prefix)
 {
     size_t      len;
-    u_char     *p, *prefix;
-    ngx_str_t   old;
+    u_char     *p, *n, *prefix;
+    ngx_int_t   rc;
 
-#if (NGX_WIN32)
+    rc = ngx_conf_test_full_name(name);
 
-    if (name->len > 2
-        && name->data[1] == ':'
-        && ((name->data[0] >= 'a' && name->data[0] <= 'z')
-             || (name->data[0] >= 'A' && name->data[0] <= 'Z')))
-    {
-        return NGX_OK;
+    if (rc == NGX_OK) {
+        return rc;
     }
 
-#else
-
-    if (name->data[0] == '/') {
-        return NGX_OK;
-    }
-
-#endif
-
-    old = *name;
-
     if (conf_prefix) {
         len = cycle->conf_prefix.len;
         prefix = cycle->conf_prefix.data;
@@ -834,19 +821,79 @@ ngx_conf_full_name(ngx_cycle_t *cycle, ngx_str_t *name, ngx_uint_t conf_prefix)
         prefix = cycle->prefix.data;
     }
 
-    name->len = len + old.len;
-    name->data = ngx_pnalloc(cycle->pool, name->len + 1);
-    if (name->data == NULL) {
+#if (NGX_WIN32)
+
+    if (rc == 2) {
+        len = rc;
+    }
+
+#endif
+
+    n = ngx_pnalloc(cycle->pool, len + name->len + 1);
+    if (n == NULL) {
         return NGX_ERROR;
     }
 
-    p = ngx_cpymem(name->data, prefix, len);
-    ngx_cpystrn(p, old.data, old.len + 1);
+    p = ngx_cpymem(n, prefix, len);
+    ngx_cpystrn(p, name->data, name->len + 1);
+
+    name->len += len;
+    name->data = n;
 
     return NGX_OK;
 }
 
 
+static ngx_int_t
+ngx_conf_test_full_name(ngx_str_t *name)
+{
+#if (NGX_WIN32)
+    u_char  c0, c1;
+
+    c0 = name->data[0];
+
+    if (name->len < 2) {
+        if (c0 == '/') {
+            return 2;
+        }
+
+        return NGX_DECLINED;
+    }
+
+    c1 = name->data[1];
+
+    if (c1 == ':') {
+        c0 |= 0x20;
+
+        if ((c0 >= 'a' && c0 <= 'z')) {
+            return NGX_OK;
+        }
+
+        return NGX_DECLINED;
+    }
+
+    if (c1 == '/') {
+        return NGX_OK;
+    }
+
+    if (c0 == '/') {
+        return 2;
+    }
+
+    return NGX_DECLINED;
+
+#else
+
+    if (name->data[0] == '/') {
+        return NGX_OK;
+    }
+
+    return NGX_DECLINED;
+
+#endif
+}
+
+
 ngx_open_file_t *
 ngx_conf_open_file(ngx_cycle_t *cycle, ngx_str_t *name)
 {
diff --git a/src/core/ngx_connection.h b/src/core/ngx_connection.h
index 5fd7a5ead..689b5f0e9 100644
--- a/src/core/ngx_connection.h
+++ b/src/core/ngx_connection.h
@@ -135,6 +135,8 @@ struct ngx_connection_s {
 
     ngx_atomic_uint_t   number;
 
+    ngx_uint_t          requests;
+
     unsigned            buffered:8;
 
     unsigned            log_error:3;     /* ngx_connection_log_error_e */
diff --git a/src/core/ngx_cycle.c b/src/core/ngx_cycle.c
index fc65765b0..63eec1459 100644
--- a/src/core/ngx_cycle.c
+++ b/src/core/ngx_cycle.c
@@ -216,7 +216,7 @@ ngx_init_cycle(ngx_cycle_t *old_cycle)
 
         if (module->create_conf) {
             rv = module->create_conf(cycle);
-            if (rv == NGX_CONF_ERROR) {
+            if (rv == NULL) {
                 ngx_destroy_pool(pool);
                 return NULL;
             }
@@ -463,11 +463,8 @@ ngx_init_cycle(ngx_cycle_t *old_cycle)
             goto failed;
         }
 
-        if (!shm_zone[i].shm.exists) {
-
-            if (ngx_init_zone_pool(cycle, &shm_zone[i]) != NGX_OK) {
-                goto failed;
-            }
+        if (ngx_init_zone_pool(cycle, &shm_zone[i]) != NGX_OK) {
+            goto failed;
         }
 
         if (shm_zone[i].init(&shm_zone[i], NULL) != NGX_OK) {
@@ -885,8 +882,21 @@ ngx_init_zone_pool(ngx_cycle_t *cycle, ngx_shm_zone_t *zn)
 
     sp = (ngx_slab_pool_t *) zn->shm.addr;
 
+    if (zn->shm.exists) {
+
+        if (sp == sp->addr) {
+            return NGX_OK;
+        }
+
+        ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
+                      "shared zone \"%V\" has no equal addresses: %p vs %p",
+                      &zn->shm.name, sp->addr, sp);
+        return NGX_ERROR;
+    }
+
     sp->end = zn->shm.addr + zn->shm.size;
     sp->min_shift = 3;
+    sp->addr = zn->shm.addr;
 
 #if (NGX_HAVE_ATOMIC_OPS)
 
diff --git a/src/core/ngx_file.c b/src/core/ngx_file.c
index 450da5623..3f47fc98b 100644
--- a/src/core/ngx_file.c
+++ b/src/core/ngx_file.c
@@ -558,8 +558,14 @@ ngx_ext_rename_file(ngx_str_t *src, ngx_str_t *to, ngx_ext_rename_file_t *ext)
 
     err = ngx_errno;
 
-    if (err == NGX_ENOENT) {
-
+    if (err
+#if (NGX_WIN32)
+            == ERROR_PATH_NOT_FOUND
+#else
+            == NGX_ENOENT
+#endif
+       )
+    {
         if (!ext->create_path) {
             goto failed;
         }
diff --git a/src/core/ngx_output_chain.c b/src/core/ngx_output_chain.c
index 71016996d..6d6d241c1 100644
--- a/src/core/ngx_output_chain.c
+++ b/src/core/ngx_output_chain.c
@@ -314,12 +314,11 @@ ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain,
 
 #endif
 
+        cl->next = NULL;
         *ll = cl;
         ll = &cl->next;
     }
 
-    *ll = NULL;
-
     return NGX_OK;
 }
 
@@ -503,6 +502,7 @@ ngx_output_chain_copy_buf(ngx_output_chain_ctx_t *ctx)
         if (src->pos == src->last) {
             dst->flush = src->flush;
             dst->last_buf = src->last_buf;
+            dst->last_in_chain = src->last_in_chain;
         }
 
     } else {
@@ -577,6 +577,7 @@ ngx_output_chain_copy_buf(ngx_output_chain_ctx_t *ctx)
         if (src->file_pos == src->file_last) {
             dst->flush = src->flush;
             dst->last_buf = src->last_buf;
+            dst->last_in_chain = src->last_in_chain;
         }
     }
 
diff --git a/src/core/ngx_slab.h b/src/core/ngx_slab.h
index 89c4687f6..291e1b51e 100644
--- a/src/core/ngx_slab.h
+++ b/src/core/ngx_slab.h
@@ -39,6 +39,7 @@ typedef struct {
     u_char            zero;
 
     void             *data;
+    void             *addr;
 } ngx_slab_pool_t;
 
 
diff --git a/src/event/modules/ngx_devpoll_module.c b/src/event/modules/ngx_devpoll_module.c
index 903efe6b5..657886268 100644
--- a/src/event/modules/ngx_devpoll_module.c
+++ b/src/event/modules/ngx_devpoll_module.c
@@ -550,7 +550,7 @@ ngx_devpoll_create_conf(ngx_cycle_t *cycle)
 
     dpcf = ngx_palloc(cycle->pool, sizeof(ngx_devpoll_conf_t));
     if (dpcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     dpcf->changes = NGX_CONF_UNSET;
diff --git a/src/event/modules/ngx_epoll_module.c b/src/event/modules/ngx_epoll_module.c
index 71d847107..b3267b37d 100644
--- a/src/event/modules/ngx_epoll_module.c
+++ b/src/event/modules/ngx_epoll_module.c
@@ -552,7 +552,7 @@ ngx_epoll_create_conf(ngx_cycle_t *cycle)
 
     epcf = ngx_palloc(cycle->pool, sizeof(ngx_epoll_conf_t));
     if (epcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     epcf->events = NGX_CONF_UNSET;
diff --git a/src/event/modules/ngx_eventport_module.c b/src/event/modules/ngx_eventport_module.c
index 4becf75d0..842d631af 100644
--- a/src/event/modules/ngx_eventport_module.c
+++ b/src/event/modules/ngx_eventport_module.c
@@ -581,7 +581,7 @@ ngx_eventport_create_conf(ngx_cycle_t *cycle)
 
     epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t));
     if (epcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     epcf->events = NGX_CONF_UNSET;
diff --git a/src/event/modules/ngx_kqueue_module.c b/src/event/modules/ngx_kqueue_module.c
index 1ad2d8d5a..a84fc8fe1 100644
--- a/src/event/modules/ngx_kqueue_module.c
+++ b/src/event/modules/ngx_kqueue_module.c
@@ -768,7 +768,7 @@ ngx_kqueue_create_conf(ngx_cycle_t *cycle)
 
     kcf = ngx_palloc(cycle->pool, sizeof(ngx_kqueue_conf_t));
     if (kcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     kcf->changes = NGX_CONF_UNSET;
diff --git a/src/event/modules/ngx_rtsig_module.c b/src/event/modules/ngx_rtsig_module.c
index 6020936b7..926be0de3 100644
--- a/src/event/modules/ngx_rtsig_module.c
+++ b/src/event/modules/ngx_rtsig_module.c
@@ -691,7 +691,7 @@ ngx_rtsig_create_conf(ngx_cycle_t *cycle)
 
     rtscf = ngx_palloc(cycle->pool, sizeof(ngx_rtsig_conf_t));
     if (rtscf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     rtscf->signo = NGX_CONF_UNSET;
diff --git a/src/event/ngx_event.c b/src/event/ngx_event.c
index e30c5636a..7fc690115 100644
--- a/src/event/ngx_event.c
+++ b/src/event/ngx_event.c
@@ -1113,7 +1113,7 @@ ngx_event_create_conf(ngx_cycle_t *cycle)
 
     ecf = ngx_palloc(cycle->pool, sizeof(ngx_event_conf_t));
     if (ecf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     ecf->connections = NGX_CONF_UNSET_UINT;
@@ -1128,7 +1128,7 @@ ngx_event_create_conf(ngx_cycle_t *cycle)
     if (ngx_array_init(&ecf->debug_connection, cycle->pool, 4,
                        sizeof(ngx_event_debug_t)) == NGX_ERROR)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
 #endif
diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index 23a4fbec4..1607814ce 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -2115,7 +2115,7 @@ ngx_openssl_create_conf(ngx_cycle_t *cycle)
 
     oscf = ngx_pcalloc(cycle->pool, sizeof(ngx_openssl_conf_t));
     if (oscf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_access_module.c b/src/http/modules/ngx_http_access_module.c
index 78b8a6a10..405aad4ef 100644
--- a/src/http/modules/ngx_http_access_module.c
+++ b/src/http/modules/ngx_http_access_module.c
@@ -201,7 +201,7 @@ ngx_http_access_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_access_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     return conf;
diff --git a/src/http/modules/ngx_http_addition_filter_module.c b/src/http/modules/ngx_http_addition_filter_module.c
index eb6a4b168..4076c5374 100644
--- a/src/http/modules/ngx_http_addition_filter_module.c
+++ b/src/http/modules/ngx_http_addition_filter_module.c
@@ -212,7 +212,7 @@ ngx_http_addition_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_addition_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_auth_basic_module.c b/src/http/modules/ngx_http_auth_basic_module.c
index 1d2d75e73..c9ce694ef 100644
--- a/src/http/modules/ngx_http_auth_basic_module.c
+++ b/src/http/modules/ngx_http_auth_basic_module.c
@@ -372,7 +372,7 @@ ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     return conf;
diff --git a/src/http/modules/ngx_http_autoindex_module.c b/src/http/modules/ngx_http_autoindex_module.c
index 6215da21f..698b7636c 100644
--- a/src/http/modules/ngx_http_autoindex_module.c
+++ b/src/http/modules/ngx_http_autoindex_module.c
@@ -145,7 +145,7 @@ ngx_http_autoindex_handler(ngx_http_request_t *r)
     ngx_int_t                       rc, size;
     ngx_str_t                       path;
     ngx_dir_t                       dir;
-    ngx_uint_t                      i, level;
+    ngx_uint_t                      i, level, utf8;
     ngx_pool_t                     *pool;
     ngx_time_t                     *tp;
     ngx_chain_t                     out;
@@ -252,6 +252,16 @@ ngx_http_autoindex_handler(ngx_http_request_t *r)
     filename = path.data;
     filename[path.len] = '/';
 
+    if (r->headers_out.charset.len == 5
+        && ngx_strncasecmp(r->headers_out.charset.data, (u_char *) "utf-8", 5)
+           == 0)
+    {
+        utf8 = 1;
+
+    } else {
+        utf8 = 0;
+    }
+
     for ( ;; ) {
         ngx_set_errno(0);
 
@@ -335,7 +345,7 @@ ngx_http_autoindex_handler(ngx_http_request_t *r)
         entry->escape = 2 * ngx_escape_uri(NULL, ngx_de_name(&dir), len,
                                            NGX_ESCAPE_HTML);
 
-        if (r->utf8) {
+        if (utf8) {
             entry->utf_len = ngx_utf8_length(entry->name.data, entry->name.len);
         } else {
             entry->utf_len = len;
@@ -622,7 +632,7 @@ ngx_http_autoindex_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_palloc(cf->pool, sizeof(ngx_http_autoindex_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     conf->enable = NGX_CONF_UNSET;
diff --git a/src/http/modules/ngx_http_browser_module.c b/src/http/modules/ngx_http_browser_module.c
index e0710c1bf..d400fec7f 100644
--- a/src/http/modules/ngx_http_browser_module.c
+++ b/src/http/modules/ngx_http_browser_module.c
@@ -423,7 +423,7 @@ ngx_http_browser_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_browser_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_charset_filter_module.c b/src/http/modules/ngx_http_charset_filter_module.c
index 4efbce76d..a76499181 100644
--- a/src/http/modules/ngx_http_charset_filter_module.c
+++ b/src/http/modules/ngx_http_charset_filter_module.c
@@ -9,8 +9,9 @@
 #include <ngx_http.h>
 
 
-#define NGX_HTTP_NO_CHARSET    -2
-#define NGX_HTTP_CHARSET_VAR   0x10000
+#define NGX_HTTP_CHARSET_OFF    -2
+#define NGX_HTTP_NO_CHARSET     -3
+#define NGX_HTTP_CHARSET_VAR    0x10000
 
 /* 1 byte length and up to 3 bytes for the UTF-8 encoding of the UCS-2 */
 #define NGX_UTF_LEN             4
@@ -61,6 +62,7 @@ typedef struct {
 typedef struct {
     u_char                     *table;
     ngx_int_t                   charset;
+    ngx_str_t                   charset_name;
 
     ngx_chain_t                *busy;
     ngx_chain_t                *free_bufs;
@@ -82,9 +84,16 @@ typedef struct {
 } ngx_http_charset_conf_ctx_t;
 
 
-static ngx_int_t ngx_http_charset_get_charset(ngx_http_charset_t *charsets,
-    ngx_uint_t n, ngx_str_t *charset);
-static ngx_int_t ngx_http_charset_set_charset(ngx_http_request_t *r,
+static ngx_int_t ngx_http_destination_charset(ngx_http_request_t *r,
+    ngx_str_t *name);
+static ngx_int_t ngx_http_main_request_charset(ngx_http_request_t *r,
+    ngx_str_t *name);
+static ngx_int_t ngx_http_source_charset(ngx_http_request_t *r,
+    ngx_str_t *name);
+static ngx_int_t ngx_http_get_charset(ngx_http_request_t *r, ngx_str_t *name);
+static ngx_inline void ngx_http_set_charset(ngx_http_request_t *r,
+    ngx_str_t *charset);
+static ngx_int_t ngx_http_charset_ctx(ngx_http_request_t *r,
     ngx_http_charset_t *charsets, ngx_int_t charset, ngx_int_t source_charset);
 static ngx_uint_t ngx_http_charset_recode(ngx_buf_t *b, u_char *table);
 static ngx_chain_t *ngx_http_charset_recode_from_utf8(ngx_pool_t *pool,
@@ -207,207 +216,264 @@ static ngx_int_t
 ngx_http_charset_header_filter(ngx_http_request_t *r)
 {
     ngx_int_t                      charset, source_charset;
-    ngx_str_t                     *mc, *from, *to, s;
-    ngx_uint_t                     n;
+    ngx_str_t                      dst, src;
     ngx_http_charset_t            *charsets;
-    ngx_http_charset_ctx_t        *ctx;
-    ngx_http_variable_value_t     *vv;
-    ngx_http_charset_loc_conf_t   *lcf, *mlcf;
     ngx_http_charset_main_conf_t  *mcf;
 
-    mcf = ngx_http_get_module_main_conf(r, ngx_http_charset_filter_module);
+    if (r == r->main) {
+        charset = ngx_http_destination_charset(r, &dst);
 
-    charsets = mcf->charsets.elts;
-    n = mcf->charsets.nelts;
+    } else {
+        charset = ngx_http_main_request_charset(r, &dst);
+    }
 
-    /* destination charset */
+    if (charset == NGX_ERROR) {
+        return NGX_ERROR;
+    }
 
-    if (r == r->main) {
+    if (charset == NGX_DECLINED) {
+        return ngx_http_next_header_filter(r);
+    }
+
+    /* charset: charset index or NGX_HTTP_NO_CHARSET */
+
+    source_charset = ngx_http_source_charset(r, &src);
+
+    if (source_charset == NGX_ERROR) {
+        return NGX_ERROR;
+    }
+
+    /*
+     * source_charset: charset index, NGX_HTTP_NO_CHARSET,
+     *                 or NGX_HTTP_CHARSET_OFF
+     */
+
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "charset: \"%V\" > \"%V\"", &src, &dst);
 
-        if (!r->ignore_content_encoding
-            && r->headers_out.content_encoding
-            && r->headers_out.content_encoding->value.len)
+    if (source_charset == NGX_HTTP_CHARSET_OFF) {
+        ngx_http_set_charset(r, &dst);
+
+        return ngx_http_next_header_filter(r);
+    }
+
+    if (charset == NGX_HTTP_NO_CHARSET
+        || source_charset == NGX_HTTP_NO_CHARSET)
+    {
+        if (source_charset != charset
+            || ngx_strncasecmp(dst.data, src.data, dst.len) != 0)
         {
-            return ngx_http_next_header_filter(r);
+            goto no_charset_map;
         }
 
-        if (r->headers_out.content_type.len == 0) {
-            return ngx_http_next_header_filter(r);
-        }
+        ngx_http_set_charset(r, &dst);
 
-        if (r->headers_out.override_charset
-            && r->headers_out.override_charset->len)
-        {
-            charset = ngx_http_charset_get_charset(charsets, n,
-                                              r->headers_out.override_charset);
+        return ngx_http_next_header_filter(r);
+    }
 
-            if (charset == NGX_HTTP_NO_CHARSET) {
-                ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
-                              "unknown charset \"%V\" to override",
-                              r->headers_out.override_charset);
+    mcf = ngx_http_get_module_main_conf(r, ngx_http_charset_filter_module);
+    charsets = mcf->charsets.elts;
 
-                return ngx_http_next_header_filter(r);
-            }
+    if (source_charset != charset
+        && (charsets[source_charset].tables == NULL
+            || charsets[source_charset].tables[charset] == NULL))
+    {
+        goto no_charset_map;
+    }
 
-        } else {
-            mlcf = ngx_http_get_module_loc_conf(r,
-                                                ngx_http_charset_filter_module);
-            charset = mlcf->charset;
+    r->headers_out.content_type.len = r->headers_out.content_type_len;
 
-            if (charset == NGX_HTTP_NO_CHARSET) {
-                return ngx_http_next_header_filter(r);
-            }
+    ngx_http_set_charset(r, &dst);
 
-            if (r->headers_out.charset.len) {
-                if (mlcf->override_charset == 0) {
-                    return ngx_http_next_header_filter(r);
-                }
+    if (source_charset != charset) {
+        return ngx_http_charset_ctx(r, charsets, charset, source_charset);
+    }
 
-            } else {
-                if (ngx_http_test_content_type(r, &mlcf->types) == NULL) {
-                    return ngx_http_next_header_filter(r);
-                }
-            }
+    return ngx_http_next_header_filter(r);
 
-            if (charset >= NGX_HTTP_CHARSET_VAR) {
-                vv = ngx_http_get_indexed_variable(r,
-                                               charset - NGX_HTTP_CHARSET_VAR);
+no_charset_map:
 
-                if (vv == NULL || vv->not_found) {
-                    return NGX_ERROR;
-                }
+    ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                  "no \"charset_map\" between the charsets \"%V\" and \"%V\"",
+                  &src, &dst);
 
-                s.len = vv->len;
-                s.data = vv->data;
+    return ngx_http_next_header_filter(r);
+}
 
-                charset = ngx_http_charset_get_charset(charsets, n, &s);
-            }
-        }
 
-    } else {
-        ctx = ngx_http_get_module_ctx(r->main, ngx_http_charset_filter_module);
+static ngx_int_t
+ngx_http_destination_charset(ngx_http_request_t *r, ngx_str_t *name)
+{
+    ngx_int_t                      charset;
+    ngx_http_charset_t            *charsets;
+    ngx_http_variable_value_t     *vv;
+    ngx_http_charset_loc_conf_t   *mlcf;
+    ngx_http_charset_main_conf_t  *mcf;
 
-        if (ctx == NULL) {
+    if (!r->ignore_content_encoding
+        && r->headers_out.content_encoding
+        && r->headers_out.content_encoding->value.len)
+    {
+        return NGX_DECLINED;
+    }
 
-            mc = &r->main->headers_out.charset;
+    if (r->headers_out.content_type.len == 0) {
+        return NGX_DECLINED;
+    }
 
-            if (mc->len == 0) {
-                return ngx_http_next_header_filter(r);
-            }
+    if (r->headers_out.override_charset
+        && r->headers_out.override_charset->len)
+    {
+        *name = *r->headers_out.override_charset;
 
-            ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_charset_ctx_t));
-            if (ctx == NULL) {
-                return NGX_ERROR;
-            }
+        charset = ngx_http_get_charset(r, name);
 
-            ngx_http_set_ctx(r->main, ctx, ngx_http_charset_filter_module);
+        if (charset != NGX_HTTP_NO_CHARSET) {
+            return charset;
+        }
+
+        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                      "unknown charset \"%V\" to override", name);
+
+        return NGX_DECLINED;
+    }
 
-            charset = ngx_http_charset_get_charset(charsets, n, mc);
+    mlcf = ngx_http_get_module_loc_conf(r, ngx_http_charset_filter_module);
+    charset = mlcf->charset;
 
-            ctx->charset = charset;
+    if (charset == NGX_HTTP_CHARSET_OFF) {
+        return NGX_DECLINED;
+    }
 
-        } else {
-            charset = ctx->charset;
+    if (r->headers_out.charset.len) {
+        if (mlcf->override_charset == 0) {
+            return NGX_DECLINED;
         }
+
+    } else {
+        if (ngx_http_test_content_type(r, &mlcf->types) == NULL) {
+            return NGX_DECLINED;
+        }
+    }
+
+    if (charset < NGX_HTTP_CHARSET_VAR) {
+        mcf = ngx_http_get_module_main_conf(r, ngx_http_charset_filter_module);
+        charsets = mcf->charsets.elts;
+        *name = charsets[charset].name;
+        return charset;
     }
 
-    /* source charset */
+    vv = ngx_http_get_indexed_variable(r, charset - NGX_HTTP_CHARSET_VAR);
 
-    if (r->headers_out.charset.len == 0) {
-        lcf = ngx_http_get_module_loc_conf(r, ngx_http_charset_filter_module);
+    if (vv == NULL || vv->not_found) {
+        return NGX_ERROR;
+    }
 
-        source_charset = lcf->source_charset;
+    name->len = vv->len;
+    name->data = vv->data;
 
-        if (source_charset >= NGX_HTTP_CHARSET_VAR) {
-            vv = ngx_http_get_indexed_variable(r,
-                                        source_charset - NGX_HTTP_CHARSET_VAR);
+    return ngx_http_get_charset(r, name);
+}
 
-            if (vv == NULL || vv->not_found) {
-                return NGX_ERROR;
-            }
 
-            s.len = vv->len;
-            s.data = vv->data;
+static ngx_int_t
+ngx_http_main_request_charset(ngx_http_request_t *r, ngx_str_t *src)
+{
+    ngx_int_t                charset;
+    ngx_str_t               *main_charset;
+    ngx_http_charset_ctx_t  *ctx;
 
-            source_charset = ngx_http_charset_get_charset(charsets, n, &s);
-        }
+    ctx = ngx_http_get_module_ctx(r->main, ngx_http_charset_filter_module);
 
-        if (charset != NGX_HTTP_NO_CHARSET) {
-            return ngx_http_charset_set_charset(r, mcf->charsets.elts, charset,
-                                                source_charset);
-        }
+    if (ctx) {
+        *src = ctx->charset_name;
+        return ctx->charset;
+    }
 
-        if (source_charset == NGX_CONF_UNSET) {
-            return ngx_http_next_header_filter(r);
-        }
+    main_charset = &r->main->headers_out.charset;
 
-        from = &charsets[source_charset].name;
-        to = &r->main->headers_out.charset;
+    if (main_charset->len == 0) {
+        return NGX_DECLINED;
+    }
 
-        goto no_charset_map;
+    ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_charset_ctx_t));
+    if (ctx == NULL) {
+        return NGX_ERROR;
     }
 
-    source_charset = ngx_http_charset_get_charset(charsets, n,
-                                                  &r->headers_out.charset);
+    ngx_http_set_ctx(r->main, ctx, ngx_http_charset_filter_module);
 
-    if (charset == NGX_HTTP_NO_CHARSET
-        || source_charset == NGX_HTTP_NO_CHARSET)
-    {
-        if (charset != source_charset
-            || ngx_strcasecmp(r->main->headers_out.charset.data,
-                              r->headers_out.charset.data)
-                != 0)
-        {
-            from = &r->headers_out.charset;
-            to = (charset == NGX_HTTP_NO_CHARSET) ?
-                                           &r->main->headers_out.charset:
-                                           &charsets[charset].name;
+    charset = ngx_http_get_charset(r, main_charset);
 
-            goto no_charset_map;
-        }
+    ctx->charset = charset;
+    ctx->charset_name = *main_charset;
+    *src = *main_charset;
 
-        return ngx_http_next_header_filter(r);
+    return charset;
+}
+
+
+static ngx_int_t
+ngx_http_source_charset(ngx_http_request_t *r, ngx_str_t *name)
+{
+    ngx_int_t                      charset;
+    ngx_http_charset_t            *charsets;
+    ngx_http_variable_value_t     *vv;
+    ngx_http_charset_loc_conf_t   *lcf;
+    ngx_http_charset_main_conf_t  *mcf;
+
+    if (r->headers_out.charset.len) {
+        *name = r->headers_out.charset;
+        return ngx_http_get_charset(r, name);
     }
 
-    if (source_charset != charset
-        && (charsets[source_charset].tables == NULL
-            || charsets[source_charset].tables[charset] == NULL))
-    {
-        from = &charsets[source_charset].name;
-        to = &charsets[charset].name;
+    lcf = ngx_http_get_module_loc_conf(r, ngx_http_charset_filter_module);
 
-        goto no_charset_map;
+    charset = lcf->source_charset;
+
+    if (charset == NGX_HTTP_CHARSET_OFF) {
+        name->len = 0;
+        return charset;
     }
 
-    r->headers_out.content_type.len = r->headers_out.content_type_len;
+    if (charset < NGX_HTTP_CHARSET_VAR) {
+        mcf = ngx_http_get_module_main_conf(r, ngx_http_charset_filter_module);
+        charsets = mcf->charsets.elts;
+        *name = charsets[charset].name;
+        return charset;
+    }
 
-    return ngx_http_charset_set_charset(r, mcf->charsets.elts, charset,
-                                        source_charset);
+    vv = ngx_http_get_indexed_variable(r, charset - NGX_HTTP_CHARSET_VAR);
 
-no_charset_map:
+    if (vv == NULL || vv->not_found) {
+        return NGX_ERROR;
+    }
 
-    ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
-                  "no \"charset_map\" between the charsets \"%V\" and \"%V\"",
-                  from, to);
+    name->len = vv->len;
+    name->data = vv->data;
 
-    return ngx_http_next_header_filter(r);
+    return ngx_http_get_charset(r, name);
 }
 
 
 static ngx_int_t
-ngx_http_charset_get_charset(ngx_http_charset_t *charsets, ngx_uint_t n,
-    ngx_str_t *charset)
+ngx_http_get_charset(ngx_http_request_t *r, ngx_str_t *name)
 {
-    ngx_uint_t  i;
+    ngx_uint_t                     i, n;
+    ngx_http_charset_t            *charset;
+    ngx_http_charset_main_conf_t  *mcf;
+
+    mcf = ngx_http_get_module_main_conf(r, ngx_http_charset_filter_module);
+
+    charset = mcf->charsets.elts;
+    n = mcf->charsets.nelts;
 
     for (i = 0; i < n; i++) {
-        if (charsets[i].name.len != charset->len) {
+        if (charset[i].name.len != name->len) {
             continue;
         }
 
-        if (ngx_strncasecmp(charsets[i].name.data, charset->data, charset->len)
-            == 0)
-        {
+        if (ngx_strncasecmp(charset[i].name.data, name->data, name->len) == 0) {
             return i;
         }
     }
@@ -416,11 +482,12 @@ ngx_http_charset_get_charset(ngx_http_charset_t *charsets, ngx_uint_t n,
 }
 
 
-static ngx_int_t
-ngx_http_charset_set_charset(ngx_http_request_t *r,
-    ngx_http_charset_t *charsets, ngx_int_t charset, ngx_int_t source_charset)
+static ngx_inline void
+ngx_http_set_charset(ngx_http_request_t *r, ngx_str_t *charset)
 {
-    ngx_http_charset_ctx_t  *ctx;
+    if (r != r->main) {
+        return;
+    }
 
     if (r->headers_out.status == NGX_HTTP_MOVED_PERMANENTLY
         || r->headers_out.status == NGX_HTTP_MOVED_TEMPORARILY)
@@ -431,16 +498,18 @@ ngx_http_charset_set_charset(ngx_http_request_t *r,
          */
 
         r->headers_out.charset.len = 0;
-
-        return ngx_http_next_header_filter(r);
+        return;
     }
 
-    r->headers_out.charset = charsets[charset].name;
-    r->utf8 = charsets[charset].utf8;
+    r->headers_out.charset = *charset;
+}
 
-    if (source_charset == NGX_CONF_UNSET || source_charset == charset) {
-        return ngx_http_next_header_filter(r);
-    }
+
+static ngx_int_t
+ngx_http_charset_ctx(ngx_http_request_t *r, ngx_http_charset_t *charsets,
+    ngx_int_t charset, ngx_int_t source_charset)
+{
+    ngx_http_charset_ctx_t  *ctx;
 
     ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_charset_ctx_t));
     if (ctx == NULL) {
@@ -451,6 +520,7 @@ ngx_http_charset_set_charset(ngx_http_request_t *r,
 
     ctx->table = charsets[source_charset].tables[charset];
     ctx->charset = charset;
+    ctx->charset_name = charsets[charset].name;
     ctx->length = charsets[charset].length;
     ctx->from_utf8 = charsets[source_charset].utf8;
     ctx->to_utf8 = charsets[charset].utf8;
@@ -1338,7 +1408,7 @@ ngx_http_set_charset_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
     if (cmd->offset == offsetof(ngx_http_charset_loc_conf_t, charset)
         && ngx_strcmp(value[1].data, "off") == 0)
     {
-        *cp = NGX_HTTP_NO_CHARSET;
+        *cp = NGX_HTTP_CHARSET_OFF;
         return NGX_CONF_OK;
     }
 
@@ -1418,27 +1488,27 @@ ngx_http_charset_create_main_conf(ngx_conf_t *cf)
 
     mcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_charset_main_conf_t));
     if (mcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&mcf->charsets, cf->pool, 2, sizeof(ngx_http_charset_t))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&mcf->tables, cf->pool, 1,
                        sizeof(ngx_http_charset_tables_t))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&mcf->recodes, cf->pool, 2,
                        sizeof(ngx_http_charset_recode_t))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     return mcf;
@@ -1452,7 +1522,7 @@ ngx_http_charset_create_loc_conf(ngx_conf_t *cf)
 
     lcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_charset_loc_conf_t));
     if (lcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
@@ -1489,14 +1559,12 @@ ngx_http_charset_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
     }
 
     ngx_conf_merge_value(conf->override_charset, prev->override_charset, 0);
-    ngx_conf_merge_value(conf->charset, prev->charset, NGX_HTTP_NO_CHARSET);
-
-    if (conf->source_charset == NGX_CONF_UNSET) {
-        conf->source_charset = prev->source_charset;
-    }
+    ngx_conf_merge_value(conf->charset, prev->charset, NGX_HTTP_CHARSET_OFF);
+    ngx_conf_merge_value(conf->source_charset, prev->source_charset,
+                         NGX_HTTP_CHARSET_OFF);
 
-    if (conf->charset == NGX_HTTP_NO_CHARSET
-        || conf->source_charset == NGX_CONF_UNSET
+    if (conf->charset == NGX_HTTP_CHARSET_OFF
+        || conf->source_charset == NGX_HTTP_CHARSET_OFF
         || conf->charset == conf->source_charset)
     {
         return NGX_CONF_OK;
diff --git a/src/http/modules/ngx_http_dav_module.c b/src/http/modules/ngx_http_dav_module.c
index 84a7672a4..7f53d5416 100644
--- a/src/http/modules/ngx_http_dav_module.c
+++ b/src/http/modules/ngx_http_dav_module.c
@@ -1154,7 +1154,7 @@ ngx_http_dav_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_dav_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index 83178dba6..2373d7cdf 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -1833,7 +1833,7 @@ ngx_http_fastcgi_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_fastcgi_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
@@ -1911,7 +1911,7 @@ ngx_http_fastcgi_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
 
     if (conf->upstream.store != 0) {
         ngx_conf_merge_value(conf->upstream.store,
-                                  prev->upstream.store, 0);
+                              prev->upstream.store, 0);
 
         if (conf->upstream.store_lengths == NULL) {
             conf->upstream.store_lengths = prev->upstream.store_lengths;
@@ -2541,20 +2541,31 @@ ngx_http_fastcgi_store(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
     ngx_str_t                  *value;
     ngx_http_script_compile_t   sc;
 
-    if (flcf->upstream.store != NGX_CONF_UNSET || flcf->upstream.store_lengths)
+    if (flcf->upstream.store != NGX_CONF_UNSET
+        || flcf->upstream.store_lengths)
     {
         return "is duplicate";
     }
 
     value = cf->args->elts;
 
-    if (ngx_strcmp(value[1].data, "on") == 0) {
-        flcf->upstream.store = 1;
+    if (ngx_strcmp(value[1].data, "off") == 0) {
+        flcf->upstream.store = 0;
         return NGX_CONF_OK;
     }
 
-    if (ngx_strcmp(value[1].data, "off") == 0) {
-        flcf->upstream.store = 0;
+#if (NGX_HTTP_CACHE)
+
+    if (flcf->upstream.cache != NGX_CONF_UNSET_PTR
+        && flcf->upstream.cache != NULL)
+    {
+        return "is incompatible with \"fastcgi_cache\"";
+    }
+
+#endif
+
+    if (ngx_strcmp(value[1].data, "on") == 0) {
+        flcf->upstream.store = 1;
         return NGX_CONF_OK;
     }
 
@@ -2599,6 +2610,10 @@ ngx_http_fastcgi_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
         return NGX_CONF_OK;
     }
 
+    if (flcf->upstream.store > 0 || flcf->upstream.store_lengths) {
+        return "is incompatible with \"fastcgi_store\"";
+    }
+
     flcf->upstream.cache = ngx_shared_memory_add(cf, &value[1], 0,
                                                  &ngx_http_fastcgi_module);
     if (flcf->upstream.cache == NULL) {
diff --git a/src/http/modules/ngx_http_gzip_filter_module.c b/src/http/modules/ngx_http_gzip_filter_module.c
index 7c7ca0a6c..62b430b71 100644
--- a/src/http/modules/ngx_http_gzip_filter_module.c
+++ b/src/http/modules/ngx_http_gzip_filter_module.c
@@ -1069,7 +1069,7 @@ ngx_http_gzip_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gzip_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_gzip_static_module.c b/src/http/modules/ngx_http_gzip_static_module.c
index 22e806ac3..19e412841 100644
--- a/src/http/modules/ngx_http_gzip_static_module.c
+++ b/src/http/modules/ngx_http_gzip_static_module.c
@@ -251,7 +251,7 @@ ngx_http_gzip_static_create_conf(ngx_conf_t *cf)
 
     conf = ngx_palloc(cf->pool, sizeof(ngx_http_gzip_static_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     conf->enable = NGX_CONF_UNSET;
diff --git a/src/http/modules/ngx_http_headers_filter_module.c b/src/http/modules/ngx_http_headers_filter_module.c
index 13cef0bea..3b5ebd68f 100644
--- a/src/http/modules/ngx_http_headers_filter_module.c
+++ b/src/http/modules/ngx_http_headers_filter_module.c
@@ -421,7 +421,7 @@ ngx_http_headers_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_headers_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_image_filter_module.c b/src/http/modules/ngx_http_image_filter_module.c
index 293a61fc3..b0e5fed6b 100644
--- a/src/http/modules/ngx_http_image_filter_module.c
+++ b/src/http/modules/ngx_http_image_filter_module.c
@@ -947,7 +947,7 @@ ngx_http_image_filter_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_image_filter_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     conf->filter = NGX_CONF_UNSET_UINT;
diff --git a/src/http/modules/ngx_http_index_module.c b/src/http/modules/ngx_http_index_module.c
index f88e599a7..d94fc118c 100644
--- a/src/http/modules/ngx_http_index_module.c
+++ b/src/http/modules/ngx_http_index_module.c
@@ -366,7 +366,7 @@ ngx_http_index_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     conf->indices = NULL;
diff --git a/src/http/modules/ngx_http_limit_req_module.c b/src/http/modules/ngx_http_limit_req_module.c
index 3d20b295d..2a07c74e5 100644
--- a/src/http/modules/ngx_http_limit_req_module.c
+++ b/src/http/modules/ngx_http_limit_req_module.c
@@ -522,7 +522,7 @@ ngx_http_limit_req_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_limit_zone_module.c b/src/http/modules/ngx_http_limit_zone_module.c
index e11e0815b..95f07c6b5 100644
--- a/src/http/modules/ngx_http_limit_zone_module.c
+++ b/src/http/modules/ngx_http_limit_zone_module.c
@@ -381,7 +381,7 @@ ngx_http_limit_zone_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_zone_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_log_module.c b/src/http/modules/ngx_http_log_module.c
index efe720bf5..170e3a264 100644
--- a/src/http/modules/ngx_http_log_module.c
+++ b/src/http/modules/ngx_http_log_module.c
@@ -714,18 +714,18 @@ ngx_http_log_create_main_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_log_main_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&conf->formats, cf->pool, 4, sizeof(ngx_http_log_fmt_t))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     fmt = ngx_array_push(&conf->formats);
     if (fmt == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     fmt->name.len = sizeof("combined") - 1;
@@ -735,7 +735,7 @@ ngx_http_log_create_main_conf(ngx_conf_t *cf)
 
     fmt->ops = ngx_array_create(cf->pool, 16, sizeof(ngx_http_log_op_t));
     if (fmt->ops == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     return conf;
@@ -749,7 +749,7 @@ ngx_http_log_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_log_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     conf->open_file_cache = NGX_CONF_UNSET_PTR;
diff --git a/src/http/modules/ngx_http_map_module.c b/src/http/modules/ngx_http_map_module.c
index d0eb02c64..1f7786c3c 100644
--- a/src/http/modules/ngx_http_map_module.c
+++ b/src/http/modules/ngx_http_map_module.c
@@ -160,7 +160,7 @@ ngx_http_map_create_conf(ngx_conf_t *cf)
 
     mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t));
     if (mcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     mcf->hash_max_size = NGX_CONF_UNSET_UINT;
diff --git a/src/http/modules/ngx_http_memcached_module.c b/src/http/modules/ngx_http_memcached_module.c
index f68be1e44..e613a2079 100644
--- a/src/http/modules/ngx_http_memcached_module.c
+++ b/src/http/modules/ngx_http_memcached_module.c
@@ -513,7 +513,7 @@ ngx_http_memcached_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_memcached_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index 484694d14..6d7350176 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -1883,7 +1883,7 @@ ngx_http_proxy_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_proxy_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
@@ -1973,7 +1973,7 @@ ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
 
     if (conf->upstream.store != 0) {
         ngx_conf_merge_value(conf->upstream.store,
-                                  prev->upstream.store, 0);
+                              prev->upstream.store, 0);
 
         if (conf->upstream.store_lengths == NULL) {
             conf->upstream.store_lengths = prev->upstream.store_lengths;
@@ -2809,20 +2809,31 @@ ngx_http_proxy_store(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
     ngx_str_t                  *value;
     ngx_http_script_compile_t   sc;
 
-    if (plcf->upstream.store != NGX_CONF_UNSET || plcf->upstream.store_lengths)
+    if (plcf->upstream.store != NGX_CONF_UNSET
+        || plcf->upstream.store_lengths)
     {
         return "is duplicate";
     }
 
     value = cf->args->elts;
 
-    if (ngx_strcmp(value[1].data, "on") == 0) {
-        plcf->upstream.store = 1;
+    if (ngx_strcmp(value[1].data, "off") == 0) {
+        plcf->upstream.store = 0;
         return NGX_CONF_OK;
     }
 
-    if (ngx_strcmp(value[1].data, "off") == 0) {
-        plcf->upstream.store = 0;
+#if (NGX_HTTP_CACHE)
+
+    if (plcf->upstream.cache != NGX_CONF_UNSET_PTR
+        && plcf->upstream.cache != NULL)
+    {
+        return "is incompatible with \"proxy_cache\"";
+    }
+
+#endif
+
+    if (ngx_strcmp(value[1].data, "on") == 0) {
+        plcf->upstream.store = 1;
         return NGX_CONF_OK;
     }
 
@@ -2867,6 +2878,10 @@ ngx_http_proxy_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
         return NGX_CONF_OK;
     }
 
+    if (plcf->upstream.store > 0 || plcf->upstream.store_lengths) {
+        return "is incompatible with \"proxy_store\"";
+    }
+
     plcf->upstream.cache = ngx_shared_memory_add(cf, &value[1], 0,
                                                  &ngx_http_proxy_module);
     if (plcf->upstream.cache == NULL) {
diff --git a/src/http/modules/ngx_http_random_index_module.c b/src/http/modules/ngx_http_random_index_module.c
index 7ddb819af..bb5544ae6 100644
--- a/src/http/modules/ngx_http_random_index_module.c
+++ b/src/http/modules/ngx_http_random_index_module.c
@@ -280,7 +280,7 @@ ngx_http_random_index_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_palloc(cf->pool, sizeof(ngx_http_random_index_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     conf->enable = NGX_CONF_UNSET;
diff --git a/src/http/modules/ngx_http_realip_module.c b/src/http/modules/ngx_http_realip_module.c
index b069a1eba..3b2cce679 100644
--- a/src/http/modules/ngx_http_realip_module.c
+++ b/src/http/modules/ngx_http_realip_module.c
@@ -360,7 +360,7 @@ ngx_http_realip_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_realip_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_referer_module.c b/src/http/modules/ngx_http_referer_module.c
index 05828997b..658f4a19c 100644
--- a/src/http/modules/ngx_http_referer_module.c
+++ b/src/http/modules/ngx_http_referer_module.c
@@ -221,7 +221,7 @@ ngx_http_referer_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_referer_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
 #if (NGX_PCRE)
diff --git a/src/http/modules/ngx_http_rewrite_module.c b/src/http/modules/ngx_http_rewrite_module.c
index a84844356..840c05330 100644
--- a/src/http/modules/ngx_http_rewrite_module.c
+++ b/src/http/modules/ngx_http_rewrite_module.c
@@ -220,7 +220,7 @@ ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_rewrite_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     conf->stack_size = NGX_CONF_UNSET_UINT;
diff --git a/src/http/modules/ngx_http_secure_link_module.c b/src/http/modules/ngx_http_secure_link_module.c
index 049a45c3e..2f9351d91 100644
--- a/src/http/modules/ngx_http_secure_link_module.c
+++ b/src/http/modules/ngx_http_secure_link_module.c
@@ -152,7 +152,7 @@ ngx_http_secure_link_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_secure_link_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_ssi_filter_module.c b/src/http/modules/ngx_http_ssi_filter_module.c
index d27d854a8..97b58fa0a 100644
--- a/src/http/modules/ngx_http_ssi_filter_module.c
+++ b/src/http/modules/ngx_http_ssi_filter_module.c
@@ -2689,14 +2689,14 @@ ngx_http_ssi_create_main_conf(ngx_conf_t *cf)
 
     smcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssi_main_conf_t));
     if (smcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     smcf->commands.pool = cf->pool;
     smcf->commands.temp_pool = cf->temp_pool;
 
     if (ngx_hash_keys_array_init(&smcf->commands, NGX_HASH_SMALL) != NGX_OK) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     return smcf;
@@ -2736,7 +2736,7 @@ ngx_http_ssi_create_loc_conf(ngx_conf_t *cf)
 
     slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssi_loc_conf_t));
     if (slcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_ssl_module.c b/src/http/modules/ngx_http_ssl_module.c
index 3bf52a2c7..c0fd6fdda 100644
--- a/src/http/modules/ngx_http_ssl_module.c
+++ b/src/http/modules/ngx_http_ssl_module.c
@@ -302,7 +302,7 @@ ngx_http_ssl_create_srv_conf(ngx_conf_t *cf)
 
     sscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t));
     if (sscf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_sub_filter_module.c b/src/http/modules/ngx_http_sub_filter_module.c
index 34f32946d..9f078819d 100644
--- a/src/http/modules/ngx_http_sub_filter_module.c
+++ b/src/http/modules/ngx_http_sub_filter_module.c
@@ -638,7 +638,7 @@ ngx_http_sub_create_conf(ngx_conf_t *cf)
 
     slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t));
     if (slcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_userid_filter_module.c b/src/http/modules/ngx_http_userid_filter_module.c
index 3462f649c..9997274a6 100644
--- a/src/http/modules/ngx_http_userid_filter_module.c
+++ b/src/http/modules/ngx_http_userid_filter_module.c
@@ -570,7 +570,7 @@ ngx_http_userid_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_userid_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/ngx_http_xslt_filter_module.c b/src/http/modules/ngx_http_xslt_filter_module.c
index 9703b50ae..87828f962 100644
--- a/src/http/modules/ngx_http_xslt_filter_module.c
+++ b/src/http/modules/ngx_http_xslt_filter_module.c
@@ -280,7 +280,7 @@ ngx_http_xslt_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
             return ngx_http_xslt_send(r, ctx, NULL);
         }
 
-        if (cl->buf->last_buf) {
+        if (cl->buf->last_buf || cl->buf->last_in_chain) {
 
             ctx->doc = ctx->ctxt->myDoc;
 
@@ -427,8 +427,8 @@ ngx_http_xslt_add_chunk(ngx_http_request_t *r, ngx_http_xslt_filter_ctx_t *ctx,
         ctx->request = r;
     }
 
-    err = xmlParseChunk(ctx->ctxt, (char *) b->pos,
-                        (int) (b->last - b->pos), b->last_buf);
+    err = xmlParseChunk(ctx->ctxt, (char *) b->pos, (int) (b->last - b->pos),
+                        (b->last_buf) || (b->last_in_chain));
 
     if (err == 0) {
         b->pos = b->last;
@@ -812,7 +812,6 @@ ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r,
     b->pos = buf;
     b->last = buf + len;
     b->memory = 1;
-    b->last_buf = 1;
 
     if (encoding) {
         r->headers_out.charset.len = ngx_strlen(encoding);
@@ -823,6 +822,8 @@ ngx_http_xslt_apply_stylesheet(ngx_http_request_t *r,
         return b;
     }
 
+    b->last_buf = 1;
+
     if (type) {
         len = ngx_strlen(type);
 
@@ -1168,7 +1169,7 @@ ngx_http_xslt_filter_create_main_conf(ngx_conf_t *cf)
 
     conf = ngx_palloc(cf->pool, sizeof(ngx_http_xslt_filter_main_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&conf->dtd_files, cf->pool, 1,
@@ -1196,7 +1197,7 @@ ngx_http_xslt_filter_create_conf(ngx_conf_t *cf)
 
     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_xslt_filter_loc_conf_t));
     if (conf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/modules/perl/nginx.pm b/src/http/modules/perl/nginx.pm
index d92ec327b..5901d38a9 100644
--- a/src/http/modules/perl/nginx.pm
+++ b/src/http/modules/perl/nginx.pm
@@ -47,7 +47,7 @@ our @EXPORT = qw(
     HTTP_INSUFFICIENT_STORAGE
 );
 
-our $VERSION = '0.7.59';
+our $VERSION = '0.8.0';
 
 require XSLoader;
 XSLoader::load('nginx', $VERSION);
diff --git a/src/http/modules/perl/ngx_http_perl_module.c b/src/http/modules/perl/ngx_http_perl_module.c
index e22428a78..4409e8fa7 100644
--- a/src/http/modules/perl/ngx_http_perl_module.c
+++ b/src/http/modules/perl/ngx_http_perl_module.c
@@ -784,7 +784,7 @@ ngx_http_perl_create_main_conf(ngx_conf_t *cf)
 
     pmcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_perl_main_conf_t));
     if (pmcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&pmcf->requires, cf->pool, 1, sizeof(u_char *))
@@ -869,7 +869,7 @@ ngx_http_perl_create_loc_conf(ngx_conf_t *cf)
 
     plcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_perl_loc_conf_t));
     if (plcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 966cbc270..3d2ccd083 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -433,6 +433,14 @@ static ngx_command_t  ngx_http_core_commands[] = {
       offsetof(ngx_http_core_loc_conf_t, limit_rate),
       NULL },
 
+    { ngx_string("limit_rate_after"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
+                        |NGX_CONF_TAKE1,
+      ngx_conf_set_size_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_core_loc_conf_t, limit_rate_after),
+      NULL },
+
     { ngx_string("keepalive_timeout"),
       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
       ngx_http_core_keepalive,
@@ -440,6 +448,13 @@ static ngx_command_t  ngx_http_core_commands[] = {
       0,
       NULL },
 
+    { ngx_string("keepalive_requests"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_num_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_core_loc_conf_t, keepalive_requests),
+      NULL },
+
     { ngx_string("satisfy"),
       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
       ngx_conf_set_enum_slot,
@@ -1326,8 +1341,13 @@ ngx_http_update_location_config(ngx_http_request_t *r)
 
     r->request_body_in_single_buf = clcf->client_body_in_single_buffer;
 
-    if (r->keepalive && clcf->keepalive_timeout == 0) {
-        r->keepalive = 0;
+    if (r->keepalive) {
+        if (clcf->keepalive_timeout == 0) {
+            r->keepalive = 0;
+
+        } else if (r->connection->requests >= clcf->keepalive_requests) {
+            r->keepalive = 0;
+        }
     }
 
     if (!clcf->tcp_nopush) {
@@ -2683,14 +2703,14 @@ ngx_http_core_create_main_conf(ngx_conf_t *cf)
 
     cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_core_main_conf_t));
     if (cmcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&cmcf->servers, cf->pool, 4,
                        sizeof(ngx_http_core_srv_conf_t *))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     cmcf->server_names_hash_max_size = NGX_CONF_UNSET_UINT;
@@ -2742,7 +2762,7 @@ ngx_http_core_create_srv_conf(ngx_conf_t *cf)
 
     cscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_core_srv_conf_t));
     if (cscf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
@@ -2755,14 +2775,14 @@ ngx_http_core_create_srv_conf(ngx_conf_t *cf)
                        sizeof(ngx_http_listen_t))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&cscf->server_names, cf->temp_pool, 4,
                        sizeof(ngx_http_server_name_t))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     cscf->connection_pool_size = NGX_CONF_UNSET_SIZE;
@@ -2873,7 +2893,7 @@ ngx_http_core_create_loc_conf(ngx_conf_t *cf)
 
     lcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_core_loc_conf_t));
     if (lcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*
@@ -2912,8 +2932,10 @@ ngx_http_core_create_loc_conf(ngx_conf_t *cf)
     lcf->send_lowat = NGX_CONF_UNSET_SIZE;
     lcf->postpone_output = NGX_CONF_UNSET_SIZE;
     lcf->limit_rate = NGX_CONF_UNSET_SIZE;
+    lcf->limit_rate_after = NGX_CONF_UNSET_SIZE;
     lcf->keepalive_timeout = NGX_CONF_UNSET_MSEC;
     lcf->keepalive_header = NGX_CONF_UNSET;
+    lcf->keepalive_requests = NGX_CONF_UNSET_UINT;
     lcf->lingering_time = NGX_CONF_UNSET_MSEC;
     lcf->lingering_timeout = NGX_CONF_UNSET_MSEC;
     lcf->resolver_timeout = NGX_CONF_UNSET_MSEC;
@@ -3110,10 +3132,14 @@ ngx_http_core_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
     ngx_conf_merge_size_value(conf->postpone_output, prev->postpone_output,
                               1460);
     ngx_conf_merge_size_value(conf->limit_rate, prev->limit_rate, 0);
+    ngx_conf_merge_size_value(conf->limit_rate_after, prev->limit_rate_after,
+                              0);
     ngx_conf_merge_msec_value(conf->keepalive_timeout,
                               prev->keepalive_timeout, 75000);
     ngx_conf_merge_sec_value(conf->keepalive_header,
                               prev->keepalive_header, 0);
+    ngx_conf_merge_uint_value(conf->keepalive_requests,
+                              prev->keepalive_requests, 100);
     ngx_conf_merge_msec_value(conf->lingering_time,
                               prev->lingering_time, 30000);
     ngx_conf_merge_msec_value(conf->lingering_timeout,
diff --git a/src/http/ngx_http_core_module.h b/src/http/ngx_http_core_module.h
index dfc07facc..e7bffbfa7 100644
--- a/src/http/ngx_http_core_module.h
+++ b/src/http/ngx_http_core_module.h
@@ -324,6 +324,7 @@ struct ngx_http_core_loc_conf_s {
     size_t        send_lowat;              /* send_lowat */
     size_t        postpone_output;         /* postpone_output */
     size_t        limit_rate;              /* limit_rate */
+    size_t        limit_rate_after;        /* limit_rate_after */
     size_t        sendfile_max_chunk;      /* sendfile_max_chunk */
 
     ngx_msec_t    client_body_timeout;     /* client_body_timeout */
@@ -337,6 +338,7 @@ struct ngx_http_core_loc_conf_s {
 
     time_t        keepalive_header;        /* keepalive_timeout */
 
+    ngx_uint_t    keepalive_requests;      /* keepalive_requests */
     ngx_uint_t    satisfy;                 /* satisfy */
     ngx_uint_t    if_modified_since;       /* if_modified_since */
     ngx_uint_t    client_body_in_file_only; /* client_body_in_file_only */
diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index c9c6db729..be5c91cbf 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -259,6 +259,8 @@ ngx_http_init_request(ngx_event_t *rev)
         return;
     }
 
+    c->requests++;
+
     hc = c->data;
 
     if (hc == NULL) {
@@ -449,13 +451,15 @@ ngx_http_init_request(ngx_event_t *rev)
                       sizeof(ngx_table_elt_t))
         != NGX_OK)
     {
-        ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+        ngx_destroy_pool(r->pool);
+        ngx_http_close_connection(c);
         return;
     }
 
     r->ctx = ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module);
     if (r->ctx == NULL) {
-        ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+        ngx_destroy_pool(r->pool);
+        ngx_http_close_connection(c);
         return;
     }
 
@@ -464,7 +468,8 @@ ngx_http_init_request(ngx_event_t *rev)
     r->variables = ngx_pcalloc(r->pool, cmcf->variables.nelts
                                         * sizeof(ngx_http_variable_value_t));
     if (r->variables == NULL) {
-        ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+        ngx_destroy_pool(r->pool);
+        ngx_http_close_connection(c);
         return;
     }
 
diff --git a/src/http/ngx_http_request.h b/src/http/ngx_http_request.h
index 97ffbbf21..fd830b2a5 100644
--- a/src/http/ngx_http_request.h
+++ b/src/http/ngx_http_request.h
@@ -488,7 +488,6 @@ struct ngx_http_request_s {
     unsigned                          root_tested:1;
     unsigned                          done:1;
     unsigned                          logged:1;
-    unsigned                          utf8:1;
 
     unsigned                          buffered:4;
 
diff --git a/src/http/ngx_http_script.c b/src/http/ngx_http_script.c
index b8e998abb..dbe6c34bd 100644
--- a/src/http/ngx_http_script.c
+++ b/src/http/ngx_http_script.c
@@ -561,7 +561,7 @@ ngx_http_script_add_code(ngx_array_t *codes, size_t size, void *code)
 
     new = ngx_array_push_n(codes, size);
     if (new == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (code) {
diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index eb839e11b..1d9ccb8b0 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -4182,7 +4182,7 @@ ngx_http_upstream_create_main_conf(ngx_conf_t *cf)
                        sizeof(ngx_http_upstream_srv_conf_t *))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     return umcf;
diff --git a/src/http/ngx_http_write_filter_module.c b/src/http/ngx_http_write_filter_module.c
index 4381a4a57..46351349c 100644
--- a/src/http/ngx_http_write_filter_module.c
+++ b/src/http/ngx_http_write_filter_module.c
@@ -46,7 +46,7 @@ ngx_module_t  ngx_http_write_filter_module = {
 ngx_int_t
 ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in)
 {
-    off_t                      size, sent, limit;
+    off_t                      size, sent, nsent, limit;
     ngx_uint_t                 last, flush;
     ngx_msec_t                 delay;
     ngx_chain_t               *cl, *ln, **ll, *chain;
@@ -210,7 +210,8 @@ ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in)
     }
 
     if (r->limit_rate) {
-        limit = r->limit_rate * (ngx_time() - r->start_sec + 1) - c->sent;
+        limit = r->limit_rate * (ngx_time() - r->start_sec + 1)
+                - (c->sent - clcf->limit_rate_after);
 
         if (limit <= 0) {
             c->write->delayed = 1;
@@ -245,7 +246,23 @@ ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in)
     }
 
     if (r->limit_rate) {
-        delay = (ngx_msec_t) ((c->sent - sent) * 1000 / r->limit_rate + 1);
+
+        nsent = c->sent;
+
+        if (clcf->limit_rate_after) {
+
+            sent -= clcf->limit_rate_after;
+            if (sent < 0) {
+                sent = 0;
+            }
+
+            nsent -= clcf->limit_rate_after;
+            if (nsent < 0) {
+                nsent = 0;
+            }
+        }
+
+        delay = (ngx_msec_t) ((nsent - sent) * 1000 / r->limit_rate + 1);
 
         if (delay > 0) {
             c->write->delayed = 1;
diff --git a/src/mail/ngx_mail_auth_http_module.c b/src/mail/ngx_mail_auth_http_module.c
index f7ad3085b..acd06656f 100644
--- a/src/mail/ngx_mail_auth_http_module.c
+++ b/src/mail/ngx_mail_auth_http_module.c
@@ -1302,7 +1302,7 @@ ngx_mail_auth_http_create_conf(ngx_conf_t *cf)
 
     ahcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_auth_http_conf_t));
     if (ahcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     ahcf->timeout = NGX_CONF_UNSET_MSEC;
diff --git a/src/mail/ngx_mail_core_module.c b/src/mail/ngx_mail_core_module.c
index d0addb059..bd2c916d5 100644
--- a/src/mail/ngx_mail_core_module.c
+++ b/src/mail/ngx_mail_core_module.c
@@ -120,20 +120,20 @@ ngx_mail_core_create_main_conf(ngx_conf_t *cf)
 
     cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_core_main_conf_t));
     if (cmcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&cmcf->servers, cf->pool, 4,
                        sizeof(ngx_mail_core_srv_conf_t *))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     if (ngx_array_init(&cmcf->listen, cf->pool, 4, sizeof(ngx_mail_listen_t))
         != NGX_OK)
     {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     return cmcf;
diff --git a/src/mail/ngx_mail_proxy_module.c b/src/mail/ngx_mail_proxy_module.c
index 193df8ada..b408ed7d3 100644
--- a/src/mail/ngx_mail_proxy_module.c
+++ b/src/mail/ngx_mail_proxy_module.c
@@ -1061,7 +1061,7 @@ ngx_mail_proxy_create_conf(ngx_conf_t *cf)
 
     pcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_proxy_conf_t));
     if (pcf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     pcf->enable = NGX_CONF_UNSET;
diff --git a/src/mail/ngx_mail_ssl_module.c b/src/mail/ngx_mail_ssl_module.c
index 4e2bda5f2..1fcdb7559 100644
--- a/src/mail/ngx_mail_ssl_module.c
+++ b/src/mail/ngx_mail_ssl_module.c
@@ -166,7 +166,7 @@ ngx_mail_ssl_create_conf(ngx_conf_t *cf)
 
     scf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_ssl_conf_t));
     if (scf == NULL) {
-        return NGX_CONF_ERROR;
+        return NULL;
     }
 
     /*