Merged revisions 281874 via svnmerge from

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

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  r281874 | mnicholson | 2010-08-11 16:11:54 -0500 (Wed, 11 Aug 2010) | 10 lines
  
  handle all possible responses to REFER requests
  
  (closes issue #17486)
  Reported by: davidw
  Patches:
        Issue17486-counterbid.diff.txt uploaded by davidw (license 780)
  Tested by: davidw
  
  Review: https://reviewboard.asterisk.org/r/837/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@281876 65c4cc65-6c06-0410-ace0-fbb531ad65f3