I have tested these two scripts to some extent but I make no
guarantees.  Use them at your own risk.
-erh

gen_obs.sh:
	Run this script from each directory in .../distrib/sets/lists.
	(i.e. cd .../distrib/sets/lists/base ; sh gen_obs.sh)
	It will generate a bunch of files called <foo>.obnew which
	should contain the obsolete files from <foo>.
	It does not handle movement of files across list files.

find_moved.sh:
	Run this script from .../distrib/sets/lists after you have
	updated the obsolete.* files (from the *.obnew files)
	It will spit out to stdout a list of files which are both
	in the lists and in the obsolete lists.