[Mailman-Users] downloading private archives in batch?

[Karl Berry]

Has anyone happened to have written a script to allow downloading
the archives of a private mailman list offline (not in a browser)?

That is, you give the mailman username/password on the command line, it
does the mailman authentication over http[s], remembers the cookie, and
gets you the "full raw archives" (for example).

It does not sound terribly difficult to write, but maybe no one has
needed it :).

I searched the documentation and FAQs and list archives and google,
with no luck.  Any pointers appreciated.

Thanks,
karl