app_meetme: Fix overwrite of DAHDI conference data structure.
Starting a conference recording using the admin menu overwrites the DAHDI
conference data structure used to modify the admin user's conference mute
mode.
* Made no longer pass the user's DAHDI conference data structure into the
menu functions. The menu now uses its own DAHDI conference data
structure to start the recording channel.
* Moved the unlock conf->playlock to before playing the conf-full message.
No sense keeping the lock while that prompt is playing. The user is never
going to get into the conference at that point.
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Merged revisions 413991 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 413992 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 413993 from http://svn.asterisk.org/svn/asterisk/branches/12
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@413994
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