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, 189 insertions, 0 deletions

diff --git a/lib/if2ip.c b/lib/if2ip.c
new file mode 100644
index 000000000..c1905d175
--- /dev/null
+++ b/lib/if2ip.c
@@ -0,0 +1,189 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  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 HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#  include <arpa/inet.h>
+#endif
+#ifdef HAVE_NET_IF_H
+#  include <net/if.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#  include <sys/ioctl.h>
+#endif
+#ifdef HAVE_NETDB_H
+#  include <netdb.h>
+#endif
+#ifdef HAVE_SYS_SOCKIO_H
+#  include <sys/sockio.h>
+#endif
+#ifdef HAVE_IFADDRS_H
+#  include <ifaddrs.h>
+#endif
+#ifdef HAVE_STROPTS_H
+#  include <stropts.h>
+#endif
+#ifdef __VMS
+#  include <inet.h>
+#endif
+
+#include "inet_ntop.h"
+#include "strequal.h"
+#include "if2ip.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/* ------------------------------------------------------------------ */
+
+#if defined(HAVE_GETIFADDRS)
+
+bool Curl_if_is_interface_name(const char *interf)
+{
+  bool result = FALSE;
+
+  struct ifaddrs *iface, *head;
+
+  if(getifaddrs(&head) >= 0) {
+    for(iface=head; iface != NULL; iface=iface->ifa_next) {
+      if(curl_strequal(iface->ifa_name, interf)) {
+        result = TRUE;
+        break;
+      }
+    }
+    freeifaddrs(head);
+  }
+  return result;
+}
+
+char *Curl_if2ip(int af, const char *interf, char *buf, int buf_size)
+{
+  struct ifaddrs *iface, *head;
+  char *ip = NULL;
+
+  if(getifaddrs(&head) >= 0) {
+    for(iface=head; iface != NULL; iface=iface->ifa_next) {
+      if((iface->ifa_addr != NULL) &&
+         (iface->ifa_addr->sa_family == af) &&
+         curl_strequal(iface->ifa_name, interf)) {
+        void *addr;
+        char scope[12]="";
+#ifdef ENABLE_IPV6
+        if(af == AF_INET6) {
+          unsigned int scopeid = 0;
+          addr = &((struct sockaddr_in6 *)iface->ifa_addr)->sin6_addr;
+#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
+          /* Include the scope of this interface as part of the address */
+          scopeid = ((struct sockaddr_in6 *)iface->ifa_addr)->sin6_scope_id;
+#endif
+          if(scopeid)
+            snprintf(scope, sizeof(scope), "%%%u", scopeid);
+        }
+        else
+#endif
+          addr = &((struct sockaddr_in *)iface->ifa_addr)->sin_addr;
+        ip = (char *) Curl_inet_ntop(af, addr, buf, buf_size);
+        strlcat(buf, scope, buf_size);
+        break;
+      }
+    }
+    freeifaddrs(head);
+  }
+  return ip;
+}
+
+#elif defined(HAVE_IOCTL_SIOCGIFADDR)
+
+bool Curl_if_is_interface_name(const char *interf)
+{
+  /* This is here just to support the old interfaces */
+  char buf[256];
+
+  char *ip = Curl_if2ip(AF_INET, interf, buf, sizeof(buf));
+
+  return (ip != NULL) ? TRUE : FALSE;
+}
+
+char *Curl_if2ip(int af, const char *interf, char *buf, int buf_size)
+{
+  struct ifreq req;
+  struct in_addr in;
+  struct sockaddr_in *s;
+  curl_socket_t dummy;
+  size_t len;
+  char *ip;
+
+  if(!interf || (af != AF_INET))
+    return NULL;
+
+  len = strlen(interf);
+  if(len >= sizeof(req.ifr_name))
+    return NULL;
+
+  dummy = socket(AF_INET, SOCK_STREAM, 0);
+  if(CURL_SOCKET_BAD == dummy)
+    return NULL;
+
+  memset(&req, 0, sizeof(req));
+  memcpy(req.ifr_name, interf, len+1);
+  req.ifr_addr.sa_family = AF_INET;
+
+  if(ioctl(dummy, SIOCGIFADDR, &req) < 0) {
+    sclose(dummy);
+    return NULL;
+  }
+
+  s = (struct sockaddr_in *)&req.ifr_addr;
+  memcpy(&in, &s->sin_addr, sizeof(in));
+  ip = (char *) Curl_inet_ntop(s->sin_family, &in, buf, buf_size);
+
+  sclose(dummy);
+  return ip;
+}
+
+#else
+
+bool Curl_if_is_interface_name(const char *interf)
+{
+  (void) interf;
+
+  return FALSE;
+}
+
+char *Curl_if2ip(int af, const char *interf, char *buf, int buf_size)
+{
+    (void) af;
+    (void) interf;
+    (void) buf;
+    (void) buf_size;
+    return NULL;
+}
+
+#endif