Merged revisions 318783 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r318783 | rmudgett | 2011-05-12 20:47:05 -0500 (Thu, 12 May 2011) | 14 lines
  
  PRI early media won't ring.
  
  And another way to pass early media.  Don't indicate that there is inband
  information present, just assume that the B channel is connected.
  
  * Restore clearing the dialing flag Rx squelch unconditionally when a
  PROCEEDING message comes in.
  
  (closes issue #19268)
  Reported by: tbsky
  Patches:
        issue19268_v1.8.patch uploaded by rmudgett (license 664)
  Tested by: tbsky
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@318784 65c4cc65-6c06-0410-ace0-fbb531ad65f3