Add support for a muted user to request to talk. The '2' option in the user

menu will adjust this status if a user is muted.  The talk request status will
be reflected in the CLI commands as well as the manager interface.

(closes issue #9418)
Reported by: imesper
Patches: 
      app_meetme_v2.patch uploaded by imesper (license 275)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@87040 65c4cc65-6c06-0410-ace0-fbb531ad65f3