Allow different socket and signalling ip on h.323 connection if gk mode is active

Reported by: Gabriele Odone
Patches:
	ASTERISK-22738-1.patch
Tested by: Gabriele Odone
(closes issue ASTERISK-22738)
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Merged revisions 408312 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 408314 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@408315 65c4cc65-6c06-0410-ace0-fbb531ad65f3