adding more headers to white list for registrations

Conflicts:
	src/mod/event_handlers/mod_kazoo/kazoo_utils.c
Parallelize inbound requests
Temporarily disable video INFO messages, they break Yealinks
Try to fix what James is whining about
additional logs
Removed parsing of the conference controls xml, as we do not use them
optionally ignore completed elsewhere
support for the nightmare transfer
support channels fetch in mod_kazoo