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, 77 deletions

diff --git a/lib/curl_amigaos.c b/lib/curl_amigaos.c
deleted file mode 100644
index c726abb68..000000000
--- a/lib/curl_amigaos.c
+++ /dev/null
@@ -1,77 +0,0 @@
-/***************************************************************************
- *                                  _   _ ____  _
- *  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 "curl_setup.h"
-
-#if defined(__AMIGA__) && !defined(__ixemul__)
-
-#include <amitcp/socketbasetags.h>
-
-#include "curl_amigaos.h"
-
-struct Library *SocketBase = NULL;
-extern int errno, h_errno;
-
-#ifdef __libnix__
-#include <stabs.h>
-void __request(const char *msg);
-#else
-# define __request( msg )       Printf( msg "\n\a")
-#endif
-
-void Curl_amiga_cleanup()
-{
-  if(SocketBase) {
-    CloseLibrary(SocketBase);
-    SocketBase = NULL;
-  }
-}
-
-bool Curl_amiga_init()
-{
-  if(!SocketBase)
-    SocketBase = OpenLibrary("bsdsocket.library", 4);
-
-  if(!SocketBase) {
-    __request("No TCP/IP Stack running!");
-    return FALSE;
-  }
-
-  if(SocketBaseTags(SBTM_SETVAL(SBTC_ERRNOPTR(sizeof(errno))), (ULONG) &errno,
-                    SBTM_SETVAL(SBTC_LOGTAGPTR), (ULONG) "cURL",
-                    TAG_DONE)) {
-    __request("SocketBaseTags ERROR");
-    return FALSE;
-  }
-
-#ifndef __libnix__
-  atexit(Curl_amiga_cleanup);
-#endif
-
-  return TRUE;
-}
-
-#ifdef __libnix__
-ADD2EXIT(Curl_amiga_cleanup,-50);
-#endif
-
-#endif /* __AMIGA__ && ! __ixemul__ */