%prog [options] find
%prog [options] cleanup [CRUFT]...
%prog [options] ignore [CRUFT]...
%prog [options] unignore [CRUFT]...
%prog finds and removes cruft from your system.
Cruft is anything that shouldn't be on the system, but is. Stretching
the definition, it is also things that should be on the system, but
aren't.