Merged revisions 78103 via svnmerge from

Merged revisions 78103 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

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r78103 | mmichelson | 2007-08-03 15:25:22 -0500 (Fri, 03 Aug 2007) | 7 lines

Changed the behavior of sip's realtime_peer function to match the corresponding way of matching for non-realtime peers.
Now matches are made on both the IP address and port number, or if the insecure setting is set to "port" then just match on the
IP address.

In order to accomplish this, I also added a new API call, ast_category_root, which returns the first variable of an ast_category struct

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@78186 65c4cc65-6c06-0410-ace0-fbb531ad65f3