[Mailman-Users] How to get relative paths in MM admin/moderator links?

We're running MM 2.1.9 at work. I noticed much to my chagrin today that all the links in the admin interface appear to be absolute URLs. At work they have this annoying habit of never using the FQDN for hosts, so our MM machine is just "lists". I can edit the URL to use the FQDN and thus get to the website via our VPN, but all the links are still

http://lists/mailman/...

Is there some way to tell MM to use relative URLs or at least to not include the http://hostname part?

Thanks,

-- Skip Montanaro - skip@pobox.com - http://www.smontanaro.net/