Manager: Add missing fields and documentation for CoreShowChannels

This corrects some issues introduced in the responses to the
CoreShowChannels AMI command as well as adding documentation for the
responses. The command in Asterisk 12 was missing the following fields:
Duration, Application, ApplicationData, and BridgedChannel and
BridgedUniqueID (replaced with BridgeId).

ASTERISK-24262 #close
Reported by: Mitch Claborn
Review: https://reviewboard.asterisk.org/r/4040/
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Merged revisions 424423 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 424424 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@424425 f38db490-d61c-443f-a65b-d21fe96a405b
PJSIP: Restore functional default for callerid_privacy

The pjsip config option default fixups from r424263 altered the
functional default from "allowed_not_screened" to "allowed". This
change restores the functional default value when none is provided.
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Merged revisions 424426 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 424427 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@424428 f38db490-d61c-443f-a65b-d21fe96a405b