Merged revisions 341599 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/10

........
  r341599 | irroot | 2011-10-20 20:20:08 +0200 (Thu, 20 Oct 2011) | 8 lines
  
  add documentation for check_state_unknown in configs/queues.conf.sample
  
  app_queue allows calls to members in a "Unknown" state to be treated as available
  setting check_state_unknown = yes will cause app_queue to query the channel driver
  to better determine the state this only applies to queues with ringinuse or ignorebusy
  set appropriately. 
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@341624 65c4cc65-6c06-0410-ace0-fbb531ad65f3