Ensure res_rtp_mutlicast sets SSRC properly

This fixes a bug where the SSRC field on multicast RTP can be stuck at
0 which can cause problems for endpoints trying to make sense of
incoming streams.

(closes issue ASTERISK-22567)
Reported by: Simone Camporeale
Patches:
    22567_res_mulitcast_ssrc.patch uploaded by Simone Camporeale (License 6536)
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Merged revisions 400393 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 400394 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 400395 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@400397 f38db490-d61c-443f-a65b-d21fe96a405b
cel: Some whitespace cleanups
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Merged revisions 400398 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@400399 f38db490-d61c-443f-a65b-d21fe96a405b
Fix a crash caused by muting and unmuting a channel in ARI without specifying a direction.

(closes issue ASTERISK-22637)
Reported by: Scott Griepentrog

Patch by Matt Jordan, whose office I have taken over in the name of Canada.
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Merged revisions 400401 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@400402 f38db490-d61c-443f-a65b-d21fe96a405b