These changes:

   a. fix a self-found problem with SPAWN-ing an extension,
      where matches were not being found
   b. correct some wording in a comment
   c. Add some debug for future debugging.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@114146 65c4cc65-6c06-0410-ace0-fbb531ad65f3