This patch slightly changes the format of the destcontrols file (with
the thought that this could grow into a jobcontrol file, or such,
possibly with a backwards compatible destcontrols parser ).  The file
format is:
	[dest=<dest regex>] [owner=<owner_regex>] [client=<client_regex>] action=...
So, basically, instead of just the single "destination regex", you can
specify regex for other input fields, somehting like:
	dest=911                        RejectNotice="No 911"
	owner=aidan client=ifax         RejectNotice=reject-aidan-remote
	owner=aidan client=localhost    RejectNotice=reject-aidan-LOCAL
	dest=+1215 client=localhost	Modem=localgroup
I have a few concerns with the format of this file.  I don't really like
the "overloading" of both input fields and output fields with the =
sign.  A possible format could be a white-space separated file:
	<dest_regex>	<owner_regex>	<client_regex>	<action1>	[ [<action2] ... ]
but this doesn't lead to a very extendable format, and makes adding (or
removing) fields problematic.
Thoughts, comments?