Merged revisions 279636,279815 via svnmerge from

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

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  r279636 | russell | 2010-07-26 16:53:30 -0500 (Mon, 26 Jul 2010) | 2 lines
  
  Ignore a control subclass of -1 in ast_waitfordigit_full().
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  r279815 | russell | 2010-07-27 11:06:58 -0500 (Tue, 27 Jul 2010) | 4 lines
  
  Support "channels" in addition to "channel" in chan_dahdi.conf.
  
  Review: https://reviewboard.asterisk.org/r/804
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@279816 65c4cc65-6c06-0410-ace0-fbb531ad65f3