Add an UPDATING file, FreeBSD-style, to record updates external to

our source and DB that need to be made on boss and ops. Things like
changes to ports or system configuration files should go into this
file.

doc/UPDATING

+Information necessary for keeping boss and ops node up-to-date. This
+file contains updates that must be made outside of the database and
+the intall tree (ie. /usr/testbed).
+
+This file is in the same format at the FreeBSD UPDATING file, whis is
+to say, in reverse chronological order, with the date of the change
+in YYYYMMDD format.
+
+20031215:
+	The mod_php4 port on boss should be recompiled with the
+	'xmlrpc' option, in addition to the 'mhash' option already
+	used. Apache on boss will need to be restarted after the new
+	port is installed.