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, 78 insertions, 0 deletions

diff --git a/lib/warnless.h b/lib/warnless.h
new file mode 100644
index 000000000..9d690d62c
--- /dev/null
+++ b/lib/warnless.h
@@ -0,0 +1,78 @@
+#ifndef HEADER_CURL_WARNLESS_H
+#define HEADER_CURL_WARNLESS_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.
+ *
+ ***************************************************************************/
+
+unsigned short curlx_ultous(unsigned long ulnum);
+
+unsigned char curlx_ultouc(unsigned long ulnum);
+
+int curlx_ultosi(unsigned long ulnum);
+
+int curlx_uztosi(size_t uznum);
+
+unsigned long curlx_uztoul(size_t uznum);
+
+unsigned int curlx_uztoui(size_t uznum);
+
+int curlx_sltosi(long slnum);
+
+unsigned int curlx_sltoui(long slnum);
+
+unsigned short curlx_sltous(long slnum);
+
+ssize_t curlx_uztosz(size_t uznum);
+
+size_t curlx_sotouz(curl_off_t sonum);
+
+int curlx_sztosi(ssize_t sznum);
+
+size_t curlx_sitouz(int sinum);
+
+#if defined(__INTEL_COMPILER) && defined(__unix__)
+
+int curlx_FD_ISSET(int fd, fd_set *fdset);
+
+void curlx_FD_SET(int fd, fd_set *fdset);
+
+void curlx_FD_ZERO(fd_set *fdset);
+
+unsigned short curlx_htons(unsigned short usnum);
+
+unsigned short curlx_ntohs(unsigned short usnum);
+
+#ifndef BUILDING_WARNLESS_C
+#  undef  FD_ISSET
+#  define FD_ISSET(a,b) curlx_FD_ISSET((a),(b))
+#  undef  FD_SET
+#  define FD_SET(a,b)   curlx_FD_SET((a),(b))
+#  undef  FD_ZERO
+#  define FD_ZERO(a)    curlx_FD_ZERO((a))
+#  undef  htons
+#  define htons(a)      curlx_htons((a))
+#  undef  ntohs
+#  define ntohs(a)      curlx_ntohs((a))
+#endif
+
+#endif /* __INTEL_COMPILER && __unix__ */
+
+#endif /* HEADER_CURL_WARNLESS_H */