Merged revisions 273474 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r273474 | jpeeler | 2010-07-01 15:19:16 -0500 (Thu, 01 Jul 2010) | 14 lines
  
  Allow admin user to join conference without using admin mode and no user pin.
  
  Configuring the conference in meetme.conf like the following:
  conf => 2345,,6666 
  did not prompt for pin when used without admin mode. This meant that the
  conference could not be joined as an admin even if the user knew the correct
  pin. The original bug report was submitted claiming that the blank user pin
  should deny entry into the conference. I think a better way to handle this
  would be with a feature enhancement that used the following syntax:
  conf => 2345,X,6666 - where X denotes no acceptable pin allowed
  
  (closes issue #15704)
  Reported by: modelnine
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@273522 65c4cc65-6c06-0410-ace0-fbb531ad65f3