Merged revisions 318549 via svnmerge from

Merged revisions 318549 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r318549 | twilson | 2011-05-11 13:39:48 -0500 (Wed, 11 May 2011) | 27 lines

  Merged revisions 318548 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2

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    r318548 | twilson | 2011-05-11 12:15:39 -0500 (Wed, 11 May 2011) | 19 lines

    Clean up several chan_sip reference leaks

    Several situations in the code could lead to peers or sip_pvt references
    being leaked. This would cause RTP ports to never be destroyed (leading
    to exhaustion of all available RTP ports) and memory leaks.

    The original patch for this issue from rgagnon was the result of an
    obscene amount of testing and hard work, for which I am very grateful. I
    did some cleanup and added a few additional refcount fixes that I found.

    (closes issue #17255)
    Reported by: kvveltho
    Patches:
          tag-1.6.2.17-r309252-sip-dos-mem-leak-fix.diff uploaded by rgagnon (license 1202)
    Tested by: rgagnon, twilson, wdoekes, loloski

    Review: https://reviewboard.asterisk.org/r/1101/
    Review: https://reviewboard.asterisk.org/r/1207/
    Review: https://reviewboard.asterisk.org/r/1210/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@318551 65c4cc65-6c06-0410-ace0-fbb531ad65f3