Manager: Require read permission for SYSTEM in order to send FullyBooted

Review: https://reviewboard.asterisk.org/r/3969/
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Merged revisions 422584 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 422625 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 422626 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 422631 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@422632 65c4cc65-6c06-0410-ace0-fbb531ad65f3