Fix the Park 'r' option when a channel parks itself.
When a channel uses the Park appliation to park itself with the 'r'
option, the channel hears music-on-hold instead of the requested ringing.
* Added a missing check for the 'r' option when a channel parks itself.
(closes issue ASTERISK-19382)
Reported by: James Stocks
Patches by: dsessions
Review: https://reviewboard.asterisk.org/r/2148/
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Merged revisions 375388 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 375389 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 375390 from http://svn.asterisk.org/svn/asterisk/branches/11
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@375391
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