Channels: Masquerades to automatically move frame/audio hooks

Whenever possible, audiohooks and framehooks will now be copied over
to the channel that the masquerading channel gets cloned into. This
should occur for all audiohooks and most framehooks. As a result,
in Asterisk 12.5 and up, the AUDIOHOOK_INHERIT function is now
deprecated and its behavior is essentially the new default for all
audiohooks, plus some additional audiohooks/framehooks.

Review: https://reviewboard.asterisk.org/r/3721/
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Merged revisions 418914 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@418936 f38db490-d61c-443f-a65b-d21fe96a405b
func_audiohookinherit.c: Fixup some XML documentation wording.
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Merged revisions 418937 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@418938 f38db490-d61c-443f-a65b-d21fe96a405b