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, 0 insertions, 168 deletions

diff --git a/lib/curl_asyn.h b/lib/curl_asyn.h
deleted file mode 100644
index 1167a3159..000000000
--- a/lib/curl_asyn.h
+++ /dev/null
@@ -1,168 +0,0 @@
-#ifndef HEADER_CURL_ASYN_H
-#define HEADER_CURL_ASYN_H
-/***************************************************************************
- *                                  _   _ ____  _
- *  Project                     ___| | | |  _ \| |
- *                             / __| | | | |_) | |
- *                            | (__| |_| |  _ <| |___
- *                             \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2013, 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 "curl_setup.h"
-#include "curl_addrinfo.h"
-
-struct addrinfo;
-struct hostent;
-struct SessionHandle;
-struct connectdata;
-struct Curl_dns_entry;
-
-/*
- * This header defines all functions in the internal asynch resolver interface.
- * All asynch resolvers need to provide these functions.
- * curl_asyn_ares.c and curl_asyn_thread.c are the current implementations of
- * asynch resolver backends.
- */
-
-/*
- * Curl_resolver_global_init()
- *
- * Called from curl_global_init() to initialize global resolver environment.
- * Returning anything else than CURLE_OK fails curl_global_init().
- */
-int Curl_resolver_global_init(void);
-
-/*
- * Curl_resolver_global_cleanup()
- * Called from curl_global_cleanup() to destroy global resolver environment.
- */
-void Curl_resolver_global_cleanup(void);
-
-/*
- * Curl_resolver_init()
- * Called from curl_easy_init() -> Curl_open() to initialize resolver
- * URL-state specific environment ('resolver' member of the UrlState
- * structure).  Should fill the passed pointer by the initialized handler.
- * Returning anything else than CURLE_OK fails curl_easy_init() with the
- * correspondent code.
- */
-CURLcode Curl_resolver_init(void **resolver);
-
-/*
- * Curl_resolver_cleanup()
- * Called from curl_easy_cleanup() -> Curl_close() to cleanup resolver
- * URL-state specific environment ('resolver' member of the UrlState
- * structure).  Should destroy the handler and free all resources connected to
- * it.
- */
-void Curl_resolver_cleanup(void *resolver);
-
-/*
- * Curl_resolver_duphandle()
- * Called from curl_easy_duphandle() to duplicate resolver URL-state specific
- * environment ('resolver' member of the UrlState structure).  Should
- * duplicate the 'from' handle and pass the resulting handle to the 'to'
- * pointer.  Returning anything else than CURLE_OK causes failed
- * curl_easy_duphandle() call.
- */
-int Curl_resolver_duphandle(void **to, void *from);
-
-/*
- * Curl_resolver_cancel().
- *
- * It is called from inside other functions to cancel currently performing
- * resolver request. Should also free any temporary resources allocated to
- * perform a request.
- */
-void Curl_resolver_cancel(struct connectdata *conn);
-
-/* Curl_resolver_getsock()
- *
- * This function is called from the multi_getsock() function.  'sock' is a
- * pointer to an array to hold the file descriptors, with 'numsock' being the
- * size of that array (in number of entries). This function is supposed to
- * return bitmask indicating what file descriptors (referring to array indexes
- * in the 'sock' array) to wait for, read/write.
- */
-int Curl_resolver_getsock(struct connectdata *conn, curl_socket_t *sock,
-                          int numsocks);
-
-/*
- * Curl_resolver_is_resolved()
- *
- * Called repeatedly to check if a previous name resolve request has
- * completed. It should also make sure to time-out if the operation seems to
- * take too long.
- *
- * Returns normal CURLcode errors.
- */
-CURLcode Curl_resolver_is_resolved(struct connectdata *conn,
-                                   struct Curl_dns_entry **dns);
-
-/*
- * Curl_resolver_wait_resolv()
- *
- * waits for a resolve to finish. This function should be avoided since using
- * this risk getting the multi interface to "hang".
- *
- * If 'entry' is non-NULL, make it point to the resolved dns entry
- *
- * Returns CURLE_COULDNT_RESOLVE_HOST if the host was not resolved, and
- * CURLE_OPERATION_TIMEDOUT if a time-out occurred.
-
- */
-CURLcode Curl_resolver_wait_resolv(struct connectdata *conn,
-                                   struct Curl_dns_entry **dnsentry);
-
-/*
- * Curl_resolver_getaddrinfo() - when using this resolver
- *
- * Returns name information about the given hostname and port number. If
- * successful, the 'hostent' is returned and the forth argument will point to
- * memory we need to free after use. That memory *MUST* be freed with
- * Curl_freeaddrinfo(), nothing else.
- *
- * Each resolver backend must of course make sure to return data in the
- * correct format to comply with this.
- */
-Curl_addrinfo *Curl_resolver_getaddrinfo(struct connectdata *conn,
-                                         const char *hostname,
-                                         int port,
-                                         int *waitp);
-
-#ifndef CURLRES_ASYNCH
-/* convert these functions if an asynch resolver isn't used */
-#define Curl_resolver_cancel(x) Curl_nop_stmt
-#define Curl_resolver_is_resolved(x,y) CURLE_COULDNT_RESOLVE_HOST
-#define Curl_resolver_wait_resolv(x,y) CURLE_COULDNT_RESOLVE_HOST
-#define Curl_resolver_getsock(x,y,z) 0
-#define Curl_resolver_duphandle(x,y) CURLE_OK
-#define Curl_resolver_init(x) CURLE_OK
-#define Curl_resolver_global_init() CURLE_OK
-#define Curl_resolver_global_cleanup() Curl_nop_stmt
-#define Curl_resolver_cleanup(x) Curl_nop_stmt
-#endif
-
-#ifdef CURLRES_ASYNCH
-#define Curl_resolver_asynch() 1
-#else
-#define Curl_resolver_asynch() 0
-#endif
-
-
-/********** end of generic resolver interface functions *****************/
-#endif /* HEADER_CURL_ASYN_H */