Update to 1.2.22

	* channels/chan_skinny.c: Properly check for the length in the
	  skinny packet to prevent an invalid memcpy. (ASA-2007-016)

	* channels/iax2-parser.h, channels/chan_iax2.c,
	  channels/iax2-parser.c: Ensure that when encoding the contents of
	  an ast_frame into an iax_frame, that the size of the destination
	  buffer is known in the iax_frame so that code won't write past
	  the end of the allocated buffer when sending outgoing frames.
	  (ASA-2007-014)

	* channels/chan_iax2.c: After parsing information elements in IAX
	  frames, set the data length to zero, so that code later on does
	  not think it has data to copy. (ASA-2007-015)

	* res/res_musiconhold.c: Fix a couple potential minor memory leaks.
	  load_moh_classes() could return without destroying the loaded
	  configuration.

	* apps/app_chanspy.c: Fixed an issue where chanspy flags were
	  uninitialized if no options were passed.

	* res/res_musiconhold.c: Ensure that adding a user to the list of
	  users of a specific music on hold class is not done at the same
	  time as any of the other operations on this list to prevent list
	  corruption.

	* channels/chan_iax2.c: The function make_trunk() can fail and
	  return -1 instead of a valid new call number. Fix the uses of
	  this function to handle this instead of treating it as the new
	  call number. This would cause a deadlock and memory corruption.

	* channels/chan_agent.c: The cli command "agent logoff Agent/x
	  soft" did not work...at all. Now it does.

	* res/res_config_odbc.c: Make sure that the ESCAPE immediately
	  follows the condition that uses LIKE. This fixes realtime
	  extensions with ODBC.

	* apps/app_queue.c: Fix an issue where it was possible to have a
	  service level of over 100% Between the time recalc_holdtime and
	  update_queue was called, it was possible that the call could have
	  been hungup.

	* dns.c: Use res_ndestroy on systems that have it. Otherwise, use
	  res_nclose. This prevents a memleak on NetBSD - and possibly
	  others.

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