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, 95 insertions, 0 deletions

diff --git a/lib/ssluse.h b/lib/ssluse.h
new file mode 100644
index 000000000..5375a6a65
--- /dev/null
+++ b/lib/ssluse.h
@@ -0,0 +1,95 @@
+#ifndef HEADER_CURL_SSLUSE_H
+#define HEADER_CURL_SSLUSE_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 "setup.h"
+
+#ifdef USE_SSLEAY
+/*
+ * This header should only be needed to get included by sslgen.c and ssluse.c
+ */
+
+#include "urldata.h"
+
+CURLcode Curl_ossl_connect(struct connectdata *conn, int sockindex);
+CURLcode Curl_ossl_connect_nonblocking(struct connectdata *conn,
+                                       int sockindex,
+                                       bool *done);
+
+/* close a SSL connection */
+void Curl_ossl_close(struct connectdata *conn, int sockindex);
+
+/* tell OpenSSL to close down all open information regarding connections (and
+   thus session ID caching etc) */
+int Curl_ossl_close_all(struct SessionHandle *data);
+
+/* Sets an OpenSSL engine */
+CURLcode Curl_ossl_set_engine(struct SessionHandle *data, const char *engine);
+
+/* function provided for the generic SSL-layer, called when a session id
+   should be freed */
+void Curl_ossl_session_free(void *ptr);
+
+/* Sets engine as default for all SSL operations */
+CURLcode Curl_ossl_set_engine_default(struct SessionHandle *data);
+
+/* Build list of OpenSSL engines */
+struct curl_slist *Curl_ossl_engines_list(struct SessionHandle *data);
+
+int Curl_ossl_init(void);
+void Curl_ossl_cleanup(void);
+
+size_t Curl_ossl_version(char *buffer, size_t size);
+int Curl_ossl_check_cxn(struct connectdata *cxn);
+int Curl_ossl_seed(struct SessionHandle *data);
+
+int Curl_ossl_shutdown(struct connectdata *conn, int sockindex);
+bool Curl_ossl_data_pending(const struct connectdata *conn,
+                            int connindex);
+void Curl_ossl_random(struct SessionHandle *data, unsigned char *entropy,
+                      size_t length);
+void Curl_ossl_md5sum(unsigned char *tmp, /* input */
+                      size_t tmplen,
+                      unsigned char *md5sum /* output */,
+                      size_t unused);
+
+/* API setup for OpenSSL */
+#define curlssl_init Curl_ossl_init
+#define curlssl_cleanup Curl_ossl_cleanup
+#define curlssl_connect Curl_ossl_connect
+#define curlssl_connect_nonblocking Curl_ossl_connect_nonblocking
+#define curlssl_session_free(x) Curl_ossl_session_free(x)
+#define curlssl_close_all Curl_ossl_close_all
+#define curlssl_close Curl_ossl_close
+#define curlssl_shutdown(x,y) Curl_ossl_shutdown(x,y)
+#define curlssl_set_engine(x,y) Curl_ossl_set_engine(x,y)
+#define curlssl_set_engine_default(x) Curl_ossl_set_engine_default(x)
+#define curlssl_engines_list(x) Curl_ossl_engines_list(x)
+#define curlssl_version Curl_ossl_version
+#define curlssl_check_cxn Curl_ossl_check_cxn
+#define curlssl_data_pending(x,y) Curl_ossl_data_pending(x,y)
+#define curlssl_random(x,y,z) Curl_ossl_random(x,y,z)
+#define curlssl_md5sum(a,b,c,d) Curl_ossl_md5sum(a,b,c,d)
+
+#endif /* USE_SSLEAY */
+#endif /* HEADER_CURL_SSLUSE_H */