MeetMe participant count.
Plays back the number of users in the specified MeetMe conference. If var is specified, playback will be skipped and the value will be returned in the variable. Upon application completion, MeetMeCount will hangup the channel, unless priority
n+1 exists, in which case priority progress will continue.
confno- Conference number.
This documentation was imported from Asterisk Version SVN-branch-13-r420538