Merged revisions 225307 via svnmerge from

Merged revisions 225307 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

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  r225307 | dvossel | 2009-10-21 16:58:46 -0500 (Wed, 21 Oct 2009) | 20 lines

  Merged revisions 225243 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.4

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    r225243 | dvossel | 2009-10-21 15:58:08 -0500 (Wed, 21 Oct 2009) | 13 lines

    IAX2: VNAK loop caused by signaling frames with no destination call number

    It is possible for the PBX thread to queue up signaling frames before
    a destination call number is received.  This can result in signaling
    frames being sent out with no destination call number. Since recent
    versions of Asterisk require accurate destination callnumbers for all
    Full Frames, this can cause a VNAK loop to occur.  To resolve this
    no signaling frames are sent until a destination callnumber is received,
    and destination call numbers are now only required for iax_pvt matching
    when the frame is an ACK.

    Review: https://reviewboard.asterisk.org/r/413/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.0@225311 65c4cc65-6c06-0410-ace0-fbb531ad65f3