Revert changes relative to lib/*.[ch] recent renaming

This reverts renaming and usage of lib/*.h header files done
28-12-2012, reverting 2 commits:

  f871de0... build: make use of 76 lib/*.h renamed files
  ffd8e12... build: rename 76 lib/*.h files

This also reverts removal of redundant include guard (redundant thanks
to changes in above commits) done 2-12-2013, reverting 1 commit:

  c087374... curl_setup.h: remove redundant include guard

This also reverts renaming and usage of lib/*.c source files done
3-12-2013, reverting 3 commits:

  13606bb... build: make use of 93 lib/*.c renamed files
  5b6e792... build: rename 93 lib/*.c files
  7d83dff... build: commit 13606bbfde follow-up 1

Start of related discussion thread:

  http://curl.haxx.se/mail/lib-2013-01/0012.html

Asking for confirmation on pushing this revertion commit:

  http://curl.haxx.se/mail/lib-2013-01/0048.html

Confirmation summary:

  http://curl.haxx.se/mail/lib-2013-01/0079.html

NOTICE: The list of 2 files that have been modified by other
intermixed commits, while renamed, and also by at least one
of the 6 commits this one reverts follows below. These 2 files
will exhibit a hole in history unless git's '--follow' option
is used when viewing logs.

  lib/curl_imap.h
  lib/curl_smtp.h

1 files changed, 343 insertions, 0 deletions

diff --git a/lib/version.c b/lib/version.c
new file mode 100644
index 000000000..ef8353ae2
--- /dev/null
+++ b/lib/version.c
@@ -0,0 +1,343 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "setup.h"
+
+#include <curl/curl.h>
+#include "urldata.h"
+#include "sslgen.h"
+
+#define _MPRINTF_REPLACE /* use the internal *printf() functions */
+#include <curl/mprintf.h>
+
+#ifdef USE_ARES
+#  if defined(CURL_STATICLIB) && !defined(CARES_STATICLIB) && \
+     (defined(WIN32) || defined(_WIN32) || defined(__SYMBIAN32__))
+#    define CARES_STATICLIB
+#  endif
+#  include <ares.h>
+#endif
+
+#ifdef USE_LIBIDN
+#include <stringprep.h>
+#endif
+
+#if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
+#include <iconv.h>
+#endif
+
+#ifdef USE_LIBRTMP
+#include <librtmp/rtmp.h>
+#endif
+
+#ifdef USE_LIBSSH2
+#include <libssh2.h>
+#endif
+
+#ifdef HAVE_LIBSSH2_VERSION
+/* get it run-time if possible */
+#define CURL_LIBSSH2_VERSION libssh2_version(0)
+#else
+/* use build-time if run-time not possible */
+#define CURL_LIBSSH2_VERSION LIBSSH2_VERSION
+#endif
+
+char *curl_version(void)
+{
+  static char version[200];
+  char *ptr = version;
+  size_t len;
+  size_t left = sizeof(version);
+
+  strcpy(ptr, LIBCURL_NAME "/" LIBCURL_VERSION);
+  len = strlen(ptr);
+  left -= len;
+  ptr += len;
+
+  if(left > 1) {
+    len = Curl_ssl_version(ptr + 1, left - 1);
+
+    if(len > 0) {
+      *ptr = ' ';
+      left -= ++len;
+      ptr += len;
+    }
+  }
+
+#ifdef HAVE_LIBZ
+  len = snprintf(ptr, left, " zlib/%s", zlibVersion());
+  left -= len;
+  ptr += len;
+#endif
+#ifdef USE_ARES
+  /* this function is only present in c-ares, not in the original ares */
+  len = snprintf(ptr, left, " c-ares/%s", ares_version(NULL));
+  left -= len;
+  ptr += len;
+#endif
+#ifdef USE_LIBIDN
+  if(stringprep_check_version(LIBIDN_REQUIRED_VERSION)) {
+    len = snprintf(ptr, left, " libidn/%s", stringprep_check_version(NULL));
+    left -= len;
+    ptr += len;
+  }
+#endif
+#ifdef USE_WIN32_IDN
+  len = snprintf(ptr, left, " WinIDN");
+  left -= len;
+  ptr += len;
+#endif
+#if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
+#ifdef _LIBICONV_VERSION
+  len = snprintf(ptr, left, " iconv/%d.%d",
+                 _LIBICONV_VERSION >> 8, _LIBICONV_VERSION & 255);
+#else
+  /* version unknown */
+  len = snprintf(ptr, left, " iconv");
+#endif /* _LIBICONV_VERSION */
+  left -= len;
+  ptr += len;
+#endif
+#ifdef USE_LIBSSH2
+  len = snprintf(ptr, left, " libssh2/%s", CURL_LIBSSH2_VERSION);
+  left -= len;
+  ptr += len;
+#endif
+#ifdef USE_LIBRTMP
+  {
+    char suff[2];
+    if(RTMP_LIB_VERSION & 0xff) {
+      suff[0] = (RTMP_LIB_VERSION & 0xff) + 'a' - 1;
+      suff[1] = '\0';
+    }
+    else
+      suff[0] = '\0';
+
+    snprintf(ptr, left, " librtmp/%d.%d%s",
+             RTMP_LIB_VERSION >> 16, (RTMP_LIB_VERSION >> 8) & 0xff,
+             suff);
+/*
+  If another lib version is added below this one, this code would
+  also have to do:
+
+    len = what snprintf() returned
+
+    left -= len;
+    ptr += len;
+*/
+  }
+#endif
+
+  return version;
+}
+
+/* data for curl_version_info
+
+   Keep the list sorted alphabetically. It is also written so that each
+   protocol line has its own #if line to make things easier on the eye.
+ */
+
+static const char * const protocols[] = {
+#ifndef CURL_DISABLE_DICT
+  "dict",
+#endif
+#ifndef CURL_DISABLE_FILE
+  "file",
+#endif
+#ifndef CURL_DISABLE_FTP
+  "ftp",
+#endif
+#if defined(USE_SSL) && !defined(CURL_DISABLE_FTP)
+  "ftps",
+#endif
+#ifndef CURL_DISABLE_GOPHER
+  "gopher",
+#endif
+#ifndef CURL_DISABLE_HTTP
+  "http",
+#endif
+#if defined(USE_SSL) && !defined(CURL_DISABLE_HTTP)
+  "https",
+#endif
+#ifndef CURL_DISABLE_IMAP
+  "imap",
+#endif
+#if defined(USE_SSL) && !defined(CURL_DISABLE_IMAP)
+  "imaps",
+#endif
+#ifndef CURL_DISABLE_LDAP
+  "ldap",
+#if !defined(CURL_DISABLE_LDAPS) && \
+    ((defined(USE_OPENLDAP) && defined(USE_SSL)) || \
+     (!defined(USE_OPENLDAP) && defined(HAVE_LDAP_SSL)))
+  "ldaps",
+#endif
+#endif
+#ifndef CURL_DISABLE_POP3
+  "pop3",
+#endif
+#if defined(USE_SSL) && !defined(CURL_DISABLE_POP3)
+  "pop3s",
+#endif
+#ifdef USE_LIBRTMP
+  "rtmp",
+#endif
+#ifndef CURL_DISABLE_RTSP
+  "rtsp",
+#endif
+#ifdef USE_LIBSSH2
+  "scp",
+#endif
+#ifdef USE_LIBSSH2
+  "sftp",
+#endif
+#ifndef CURL_DISABLE_SMTP
+  "smtp",
+#endif
+#if defined(USE_SSL) && !defined(CURL_DISABLE_SMTP)
+  "smtps",
+#endif
+#ifndef CURL_DISABLE_TELNET
+  "telnet",
+#endif
+#ifndef CURL_DISABLE_TFTP
+  "tftp",
+#endif
+
+  NULL
+};
+
+static curl_version_info_data version_info = {
+  CURLVERSION_NOW,
+  LIBCURL_VERSION,
+  LIBCURL_VERSION_NUM,
+  OS, /* as found by configure or set by hand at build-time */
+  0 /* features is 0 by default */
+#ifdef ENABLE_IPV6
+  | CURL_VERSION_IPV6
+#endif
+#ifdef HAVE_KRB4
+  | CURL_VERSION_KERBEROS4
+#endif
+#ifdef USE_SSL
+  | CURL_VERSION_SSL
+#endif
+#ifdef USE_NTLM
+  | CURL_VERSION_NTLM
+#endif
+#if defined(USE_NTLM) && defined(NTLM_WB_ENABLED)
+  | CURL_VERSION_NTLM_WB
+#endif
+#ifdef USE_WINDOWS_SSPI
+  | CURL_VERSION_SSPI
+#endif
+#ifdef HAVE_LIBZ
+  | CURL_VERSION_LIBZ
+#endif
+#ifdef USE_HTTP_NEGOTIATE
+  | CURL_VERSION_GSSNEGOTIATE
+#endif
+#ifdef DEBUGBUILD
+  | CURL_VERSION_DEBUG
+#endif
+#ifdef CURLDEBUG
+  | CURL_VERSION_CURLDEBUG
+#endif
+#ifdef CURLRES_ASYNCH
+  | CURL_VERSION_ASYNCHDNS
+#endif
+#ifdef HAVE_SPNEGO
+  | CURL_VERSION_SPNEGO
+#endif
+#if (CURL_SIZEOF_CURL_OFF_T > 4) && \
+    ( (SIZEOF_OFF_T > 4) || defined(USE_WIN32_LARGE_FILES) )
+  | CURL_VERSION_LARGEFILE
+#endif
+#if defined(CURL_DOES_CONVERSIONS)
+  | CURL_VERSION_CONV
+#endif
+#if defined(USE_TLS_SRP)
+  | CURL_VERSION_TLSAUTH_SRP
+#endif
+  ,
+  NULL, /* ssl_version */
+  0,    /* ssl_version_num, this is kept at zero */
+  NULL, /* zlib_version */
+  protocols,
+  NULL, /* c-ares version */
+  0,    /* c-ares version numerical */
+  NULL, /* libidn version */
+  0,    /* iconv version */
+  NULL, /* ssh lib version */
+};
+
+curl_version_info_data *curl_version_info(CURLversion stamp)
+{
+#ifdef USE_LIBSSH2
+  static char ssh_buffer[80];
+#endif
+
+#ifdef USE_SSL
+  static char ssl_buffer[80];
+  Curl_ssl_version(ssl_buffer, sizeof(ssl_buffer));
+  version_info.ssl_version = ssl_buffer;
+#endif
+
+#ifdef HAVE_LIBZ
+  version_info.libz_version = zlibVersion();
+  /* libz left NULL if non-existing */
+#endif
+#ifdef USE_ARES
+  {
+    int aresnum;
+    version_info.ares = ares_version(&aresnum);
+    version_info.ares_num = aresnum;
+  }
+#endif
+#ifdef USE_LIBIDN
+  /* This returns a version string if we use the given version or later,
+     otherwise it returns NULL */
+  version_info.libidn = stringprep_check_version(LIBIDN_REQUIRED_VERSION);
+  if(version_info.libidn)
+    version_info.features |= CURL_VERSION_IDN;
+#elif defined(USE_WIN32_IDN)
+  version_info.features |= CURL_VERSION_IDN;
+#endif
+
+#if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
+#ifdef _LIBICONV_VERSION
+  version_info.iconv_ver_num = _LIBICONV_VERSION;
+#else
+  /* version unknown */
+  version_info.iconv_ver_num = -1;
+#endif /* _LIBICONV_VERSION */
+#endif
+
+#ifdef USE_LIBSSH2
+  snprintf(ssh_buffer, sizeof(ssh_buffer), "libssh2/%s", LIBSSH2_VERSION);
+  version_info.libssh_version = ssh_buffer;
+#endif
+
+  (void)stamp; /* avoid compiler warnings, we don't use this */
+
+  return &version_info;
+}