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, 169 insertions, 0 deletions

diff --git a/lib/gopher.c b/lib/gopher.c
new file mode 100644
index 000000000..e8f2790fc
--- /dev/null
+++ b/lib/gopher.c
@@ -0,0 +1,169 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  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"
+
+#ifndef CURL_DISABLE_GOPHER
+
+#include "urldata.h"
+#include <curl/curl.h>
+#include "transfer.h"
+#include "sendf.h"
+
+#include "progress.h"
+#include "strequal.h"
+#include "gopher.h"
+#include "rawstr.h"
+#include "select.h"
+#include "url.h"
+#include "warnless.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/*
+ * Forward declarations.
+ */
+
+static CURLcode gopher_do(struct connectdata *conn, bool *done);
+
+/*
+ * Gopher protocol handler.
+ * This is also a nice simple template to build off for simple
+ * connect-command-download protocols.
+ */
+
+const struct Curl_handler Curl_handler_gopher = {
+  "GOPHER",                             /* scheme */
+  ZERO_NULL,                            /* setup_connection */
+  gopher_do,                            /* do_it */
+  ZERO_NULL,                            /* done */
+  ZERO_NULL,                            /* do_more */
+  ZERO_NULL,                            /* connect_it */
+  ZERO_NULL,                            /* connecting */
+  ZERO_NULL,                            /* doing */
+  ZERO_NULL,                            /* proto_getsock */
+  ZERO_NULL,                            /* doing_getsock */
+  ZERO_NULL,                            /* domore_getsock */
+  ZERO_NULL,                            /* perform_getsock */
+  ZERO_NULL,                            /* disconnect */
+  ZERO_NULL,                            /* readwrite */
+  PORT_GOPHER,                          /* defport */
+  CURLPROTO_GOPHER,                     /* protocol */
+  PROTOPT_NONE                          /* flags */
+};
+
+static CURLcode gopher_do(struct connectdata *conn, bool *done)
+{
+  CURLcode result=CURLE_OK;
+  struct SessionHandle *data=conn->data;
+  curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
+
+  curl_off_t *bytecount = &data->req.bytecount;
+  char *path = data->state.path;
+  char *sel;
+  char *sel_org = NULL;
+  ssize_t amount, k;
+
+  *done = TRUE; /* unconditionally */
+
+  /* Create selector. Degenerate cases: / and /1 => convert to "" */
+  if(strlen(path) <= 2)
+    sel = (char *)"";
+  else {
+    char *newp;
+    size_t j, i;
+    int len;
+
+    /* Otherwise, drop / and the first character (i.e., item type) ... */
+    newp = path;
+    newp+=2;
+
+    /* ... then turn ? into TAB for search servers, Veronica, etc. ... */
+    j = strlen(newp);
+    for(i=0; i<j; i++)
+      if(newp[i] == '?')
+        newp[i] = '\x09';
+
+    /* ... and finally unescape */
+    sel = curl_easy_unescape(data, newp, 0, &len);
+    if(!sel)
+      return CURLE_OUT_OF_MEMORY;
+    sel_org = sel;
+  }
+
+  /* We use Curl_write instead of Curl_sendf to make sure the entire buffer is
+     sent, which could be sizeable with long selectors. */
+  k = curlx_uztosz(strlen(sel));
+
+  for(;;) {
+    result = Curl_write(conn, sockfd, sel, k, &amount);
+    if(CURLE_OK == result) { /* Which may not have written it all! */
+      result = Curl_client_write(conn, CLIENTWRITE_HEADER, sel, amount);
+      if(result) {
+        Curl_safefree(sel_org);
+        return result;
+      }
+      k -= amount;
+      sel += amount;
+      if(k < 1)
+        break; /* but it did write it all */
+    }
+    else {
+      failf(data, "Failed sending Gopher request");
+      Curl_safefree(sel_org);
+      return result;
+    }
+    /* Don't busyloop. The entire loop thing is a work-around as it causes a
+       BLOCKING behavior which is a NO-NO. This function should rather be
+       split up in a do and a doing piece where the pieces that aren't
+       possible to send now will be sent in the doing function repeatedly
+       until the entire request is sent.
+
+       Wait a while for the socket to be writable. Note that this doesn't
+       acknowledge the timeout.
+    */
+    Curl_socket_ready(CURL_SOCKET_BAD, sockfd, 100);
+  }
+
+  Curl_safefree(sel_org);
+
+  /* We can use Curl_sendf to send the terminal \r\n relatively safely and
+     save allocing another string/doing another _write loop. */
+  result = Curl_sendf(sockfd, conn, "\r\n");
+  if(result != CURLE_OK) {
+    failf(data, "Failed sending Gopher request");
+    return result;
+  }
+  result = Curl_client_write(conn, CLIENTWRITE_HEADER, (char *)"\r\n", 2);
+  if(result)
+    return result;
+
+  Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, bytecount,
+                      -1, NULL); /* no upload */
+  return CURLE_OK;
+}
+#endif /*CURL_DISABLE_GOPHER*/