Turn off warning message when bind address is set to any.

When a bind address is set to an ANY address (udpbindport=::), a warning message
is displayed stating that "Address remapping activated in sip.conf but we're
using IPv6, which doesn't need it.  Please remove 'localnet' and/or 'externaddr'
settings."  But if one is running dual stack, we shouldn't be told to turn those
settings off.

This patch checks if the bind address is an ANY address or not.  The warning
message will now only be displayed if the bind address is NOT an ANY address and
IPv6 is being used.

Also, updated the copyright year.

(closes issue ASTERISK-19456) 
Reported by: Michael L. Young 
Tested by: Michael L. Young 
Patches: 
  chan_sip_ipv6_message.diff uploaded by Michael L. Young (license 5026)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@362253 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -1,7 +1,7 @@
 /*
  * Asterisk -- An open source telephony toolkit.
  *
- * Copyright (C) 1999 - 2006, Digium, Inc.
+ * Copyright (C) 1999 - 2012, Digium, Inc.
  *
  * Mark Spencer <markster@digium.com>
  *
@@ -3417,7 +3417,7 @@ static void ast_sip_ouraddrfor(const struct ast_sockaddr *them, struct ast_socka
 	ast_sockaddr_copy(&theirs, them);
 
 	if (ast_sockaddr_is_ipv6(&theirs)) {
-		if (localaddr && !ast_sockaddr_isnull(&externaddr)) {
+		if (localaddr && !ast_sockaddr_isnull(&externaddr) && !ast_sockaddr_is_any(&bindaddr)) {
 			ast_log(LOG_WARNING, "Address remapping activated in sip.conf "
 				"but we're using IPv6, which doesn't need it. Please "
 				"remove \"localnet\" and/or \"externaddr\" settings.\n");