(closes issue #10603)

Reported by: jmls
Patches:
      pbx.diff uploaded by jmls (license 141)
Add REASON dialplan variable for when an originated call fails and the failed extension is executed.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@81372 65c4cc65-6c06-0410-ace0-fbb531ad65f3