Merged revisions 333786 via svnmerge from

Merged revisions 333786 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/10

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  r333786 | rmudgett | 2011-08-29 16:12:29 -0500 (Mon, 29 Aug 2011) | 13 lines

  Merged revisions 333784-333785 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.8

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    r333784 | rmudgett | 2011-08-29 16:05:43 -0500 (Mon, 29 Aug 2011) | 2 lines

    Fix deadlock potential of chan_mobile.c:mbl_ast_hangup().
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    r333785 | rmudgett | 2011-08-29 16:06:16 -0500 (Mon, 29 Aug 2011) | 1 line

    Add some do not hold locks notes to channel.h
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@333789 65c4cc65-6c06-0410-ace0-fbb531ad65f3