* Add command to reverse the action of rmm [-nounlink] -- "urmm"? "umm"? "um"?
* Allow user customization of which kinds of text parts in multipart/alternative
messages are preferred. It would be nice if one selectable behavior would be
to be prompted at runtime for which version to show.
* Add a new %-escape that makes temp files more permanent than %f, so that you
can use gnuclient -q or netscape -remote on message parts. Put netscape
-remote in mhn.defaults for text/html once this is done.