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, 107 deletions

diff --git a/lib/curl_connect.h b/lib/curl_connect.h
deleted file mode 100644
index db23b9281..000000000
--- a/lib/curl_connect.h
+++ /dev/null
@@ -1,107 +0,0 @@
-#ifndef HEADER_CURL_CONNECT_H
-#define HEADER_CURL_CONNECT_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 "curl_setup.h"
-
-#include "curl_nonblock.h"
-#include "curl_sockaddr.h"
-
-CURLcode Curl_is_connected(struct connectdata *conn,
-                           int sockindex,
-                           bool *connected);
-
-CURLcode Curl_connecthost(struct connectdata *conn,
-                          const struct Curl_dns_entry *host, /* connect to
-                                                                this */
-                          curl_socket_t *sockconn, /* not set if error */
-                          Curl_addrinfo **addr, /* the one we used */
-                          bool *connected); /* truly connected? */
-
-/* generic function that returns how much time there's left to run, according
-   to the timeouts set */
-long Curl_timeleft(struct SessionHandle *data,
-                   struct timeval *nowp,
-                   bool duringconnect);
-
-#define DEFAULT_CONNECT_TIMEOUT 300000 /* milliseconds == five minutes */
-
-/*
- * Used to extract socket and connectdata struct for the most recent
- * transfer on the given SessionHandle.
- *
- * The returned socket will be CURL_SOCKET_BAD in case of failure!
- */
-curl_socket_t Curl_getconnectinfo(struct SessionHandle *data,
-                                  struct connectdata **connp);
-
-#ifdef USE_WINSOCK
-/* When you run a program that uses the Windows Sockets API, you may
-   experience slow performance when you copy data to a TCP server.
-
-   http://support.microsoft.com/kb/823764
-
-   Work-around: Make the Socket Send Buffer Size Larger Than the Program Send
-   Buffer Size
-
-*/
-void Curl_sndbufset(curl_socket_t sockfd);
-#else
-#define Curl_sndbufset(y) Curl_nop_stmt
-#endif
-
-void Curl_updateconninfo(struct connectdata *conn, curl_socket_t sockfd);
-void Curl_persistconninfo(struct connectdata *conn);
-int Curl_closesocket(struct connectdata *conn, curl_socket_t sock);
-
-/*
- * The Curl_sockaddr_ex structure is basically libcurl's external API
- * curl_sockaddr structure with enough space available to directly hold any
- * protocol-specific address structures. The variable declared here will be
- * used to pass / receive data to/from the fopensocket callback if this has
- * been set, before that, it is initialized from parameters.
- */
-struct Curl_sockaddr_ex {
-  int family;
-  int socktype;
-  int protocol;
-  unsigned int addrlen;
-  union {
-    struct sockaddr addr;
-    struct Curl_sockaddr_storage buff;
-  } _sa_ex_u;
-};
-#define sa_addr _sa_ex_u.addr
-
-/*
- * Create a socket based on info from 'conn' and 'ai'.
- *
- * Fill in 'addr' and 'sockfd' accordingly if OK is returned. If the open
- * socket callback is set, used that!
- *
- */
-CURLcode Curl_socket(struct connectdata *conn,
-                     const Curl_addrinfo *ai,
-                     struct Curl_sockaddr_ex *addr,
-                     curl_socket_t *sockfd);
-
-#endif /* HEADER_CURL_CONNECT_H */