One of the non-Listserv managed lists I'm on has List-Archive and
List-Unsubscribe headers such as these:

List-Archive: http://www.imc.org/ietf-pkix/mail-archive/
List-Unsubscribe: mailto:[log in to unmask]

These are helpful functions, but I don't believe they're available in
Listserv as of the Unix 1.8d release.  Are they available or planned for
inclusion?
    Rich