Hello. I just recently started using fancy splitting of mailing
lists. It worked great except for one thing - if someone sent a mail
to Mailing-List-dev@domain, it got sorted into lists.dev.Mailing-List
rather than the desired lists.dev.mailing-list.

After some research it seems like Gnus doesn't support lowercasing the
expanded text so I decided to add it. The patch is attached.

One small note: It might be more correct to add support for the
features used in replace-match, i.e \l, \L and such (or perhaps it's
possible to use the replace-match somehow, I don't know). However all
_I_ needed was lowercasing and also my lisp skills are somewhat
lacking so I don't want to attempt to make such a change.

Never the less, I figured I could just as well ship this patch to the
list for possible inclusion.

-- 
David Hedbor, Software Development Engineer - Real Networks
Helix Community: http://helixcommunity.org