Merged revisions 203672 via svnmerge from

Merged revisions 203672 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

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  r203672 | jpeeler | 2009-06-26 14:03:25 -0500 (Fri, 26 Jun 2009) | 16 lines

  Check if polarityonanswerdelay has elapsed before setting a channel as answered
  after a polarity reversal.

  Previously on a polarity switch event chan_dahdi would set the channel
  immediately as answered. This would cause problems if a polarity reversal
  occurred when the line was picked up as the dial would not have yet occurred.
  Now if the polarity reversal occurs before delay has elapsed after coming off
  hook or an answer, it is ignored. Also, some refactoring was done in
  _handle_event.

  (closes issue #13917)
  Reported by: alecdavis
  Patches:
        chan_dahdi.bug13917.feb09.diff2.txt uploaded by alecdavis (license 585)
  Tested by: alecdavis
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