netsock2: Define AST_AF_* enum constants to their AF_* equivalents

This patch explicitly defines AST_AF_* enum constants to their sys/socket.h
defined equivalents. It is certainly unclear why these constants actually have
to exist, given that netsock2.h includes sys/socket.h; however, since the code
base is already liberally sprinkled with the usage of AST_AF_* (as well as with
direct calls to AF_*), this will at least keep the semantics consistent between
their usage across systems.
........

Merged revisions 402503 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@402504 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/netsock2.h

@@ -37,9 +37,9 @@ extern "C" {
  * ever include socket.h.
  */
 enum {
-	AST_AF_UNSPEC	= 0,
-	AST_AF_INET	= 2,
-	AST_AF_INET6	= 10,
+	AST_AF_UNSPEC = AF_UNSPEC,
+	AST_AF_INET   = AF_INET,
+	AST_AF_INET6  = AF_INET6,
 };
 
 enum ast_transport {