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, 86 insertions, 0 deletions

diff --git a/lib/url.h b/lib/url.h
new file mode 100644
index 000000000..ab6d3d048
--- /dev/null
+++ b/lib/url.h
@@ -0,0 +1,86 @@
+#ifndef HEADER_CURL_URL_H
+#define HEADER_CURL_URL_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2011, 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"
+
+/*
+ * Prototypes for library-wide functions provided by url.c
+ */
+
+CURLcode Curl_open(struct SessionHandle **curl);
+CURLcode Curl_init_userdefined(struct UserDefined *set);
+CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
+                     va_list arg);
+CURLcode Curl_dupset(struct SessionHandle * dst, struct SessionHandle * src);
+void Curl_freeset(struct SessionHandle * data);
+CURLcode Curl_close(struct SessionHandle *data); /* opposite of curl_open() */
+CURLcode Curl_connect(struct SessionHandle *, struct connectdata **,
+                      bool *async, bool *protocol_connect);
+CURLcode Curl_do(struct connectdata **, bool *done);
+CURLcode Curl_do_more(struct connectdata *, bool *completed);
+CURLcode Curl_done(struct connectdata **, CURLcode, bool premature);
+CURLcode Curl_disconnect(struct connectdata *, bool dead_connection);
+CURLcode Curl_protocol_connect(struct connectdata *conn, bool *done);
+CURLcode Curl_protocol_connecting(struct connectdata *conn, bool *done);
+CURLcode Curl_protocol_doing(struct connectdata *conn, bool *done);
+CURLcode Curl_setup_conn(struct connectdata *conn,
+                         bool *protocol_done);
+
+int Curl_protocol_getsock(struct connectdata *conn,
+                          curl_socket_t *socks,
+                          int numsocks);
+int Curl_doing_getsock(struct connectdata *conn,
+                       curl_socket_t *socks,
+                       int numsocks);
+
+bool Curl_isPipeliningEnabled(const struct SessionHandle *handle);
+CURLcode Curl_addHandleToPipeline(struct SessionHandle *handle,
+                                  struct curl_llist *pipeline);
+int Curl_removeHandleFromPipeline(struct SessionHandle *handle,
+                                  struct curl_llist *pipeline);
+/* remove the specified connection from all (possible) pipelines and related
+   queues */
+void Curl_getoff_all_pipelines(struct SessionHandle *data,
+                               struct connectdata *conn);
+
+void Curl_close_connections(struct SessionHandle *data);
+
+/* Called on connect, and if there's already a protocol-specific struct
+   allocated for a different connection, this frees it that it can be setup
+   properly later on. */
+void Curl_reset_reqproto(struct connectdata *conn);
+
+#define CURL_DEFAULT_PROXY_PORT 1080 /* default proxy port unless specified */
+#define CURL_DEFAULT_SOCKS5_GSSAPI_SERVICE "rcmd" /* default socks5 gssapi
+                                                     service */
+
+CURLcode Curl_connected_proxy(struct connectdata *conn);
+
+#ifdef CURL_DISABLE_VERBOSE_STRINGS
+#define Curl_verboseconnect(x)  Curl_nop_stmt
+#else
+void Curl_verboseconnect(struct connectdata *conn);
+#endif
+
+
+#endif /* HEADER_CURL_URL_H */