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, 108 deletions

diff --git a/lib/curl_select.h b/lib/curl_select.h
deleted file mode 100644
index 00789bb89..000000000
--- a/lib/curl_select.h
+++ /dev/null
@@ -1,108 +0,0 @@
-#ifndef HEADER_CURL_SELECT_H
-#define HEADER_CURL_SELECT_H
-/***************************************************************************
- *                                  _   _ ____  _
- *  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"
-
-#ifdef HAVE_SYS_POLL_H
-#include <sys/poll.h>
-#elif defined(HAVE_POLL_H)
-#include <poll.h>
-#endif
-
-/*
- * Definition of pollfd struct and constants for platforms lacking them.
- */
-
-#if !defined(HAVE_STRUCT_POLLFD) && \
-    !defined(HAVE_SYS_POLL_H) && \
-    !defined(HAVE_POLL_H)
-
-#define POLLIN      0x01
-#define POLLPRI     0x02
-#define POLLOUT     0x04
-#define POLLERR     0x08
-#define POLLHUP     0x10
-#define POLLNVAL    0x20
-
-struct pollfd
-{
-    curl_socket_t fd;
-    short   events;
-    short   revents;
-};
-
-#endif
-
-#ifndef POLLRDNORM
-#define POLLRDNORM POLLIN
-#endif
-
-#ifndef POLLWRNORM
-#define POLLWRNORM POLLOUT
-#endif
-
-#ifndef POLLRDBAND
-#define POLLRDBAND POLLPRI
-#endif
-
-/* there are three CSELECT defines that are defined in the public header that
-   are exposed to users, but this *IN2 bit is only ever used internally and
-   therefore defined here */
-#define CURL_CSELECT_IN2 (CURL_CSELECT_ERR << 1)
-
-int Curl_socket_check(curl_socket_t readfd, curl_socket_t readfd2,
-                      curl_socket_t writefd,
-                      long timeout_ms);
-
-/* provide the former API internally */
-#define Curl_socket_ready(x,y,z) \
-  Curl_socket_check(x, CURL_SOCKET_BAD, y, z)
-
-int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms);
-
-int Curl_wait_ms(int timeout_ms);
-
-#ifdef TPF
-int tpf_select_libcurl(int maxfds, fd_set* reads, fd_set* writes,
-                       fd_set* excepts, struct timeval* tv);
-#endif
-
-/* Winsock and TPF sockets are not in range [0..FD_SETSIZE-1], which
-   unfortunately makes it impossible for us to easily check if they're valid
-*/
-#if defined(USE_WINSOCK) || defined(TPF)
-#define VALID_SOCK(x) 1
-#define VERIFY_SOCK(x) Curl_nop_stmt
-#else
-#define VALID_SOCK(s) (((s) >= 0) && ((s) < FD_SETSIZE))
-#define VERIFY_SOCK(x) do { \
-  if(!VALID_SOCK(x)) { \
-    SET_SOCKERRNO(EINVAL); \
-    return -1; \
-  } \
-} WHILE_FALSE
-#endif
-
-#endif /* HEADER_CURL_SELECT_H */
-