Merged revisions 313545 via svnmerge from

Merged revisions 313545 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r313545 | rmudgett | 2011-04-13 11:21:24 -0500 (Wed, 13 Apr 2011) | 41 lines

  Asterisk does not hangup a channel after endpoint hangs up.

  If the call that the dialplan started an AGI script for is hungup while
  the AGI script is in the middle of a command then the AGI script is not
  notified of the hangup.  There are many AGI Exec commands that this can
  happen with.  The reported applications have been: Background, Wait, Read,
  and Dial.  Also the AGI Get Data command.

  * Don't wait on the Asterisk channel after it has hung up.  The channel is
  likely to never need servicing again.

  * Restored the AGI script's ability to return the AGI_RESULT_HANGUP value
  in run_agi().  It previously only could return AGI_RESULT_SUCCESS or
  AGI_RESULT_FAILURE after the DeadAGI and AGI applications were merged.

  (closes issue #17954)
  Reported by: mn3250
  Patches:
        issue17954_v1.8.patch uploaded by rmudgett (license 664)
        issue17954_v1.6.2.patch uploaded by rmudgett (license 664)
        issue17954_v1.4.patch uploaded by rmudgett (license 664)
  Tested by: rmudgett
  JIRA SWP-2171

  (closes issue #18492)
  Reported by: devmod
  Tested by: rmudgett
  JIRA SWP-2761

  (closes issue #18935)
  Reported by: nvitaly
  Tested by: astmiv, rmudgett
  JIRA SWP-3216

  (closes issue #17393)
  Reported by: siby
  Tested by: rmudgett
  JIRA SWP-2727

  Review: https://reviewboard.asterisk.org/r/1165/
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