Xlabel

I finally applied David Champian's [xlabel Patch](http://home.uchicago.edu/~dgc/sw/mutt/patch-1.5.17.dgc.xlabel_ext.9) (see also the description [here](http://dev.mutt.org/trac/wiki/PatchList)) to the current tree.

I doubt I'll actively track the original HG repository, mainly because I couldn't figure out how to track HG remotes easily on Debian. (It was much easier for me to clone your repo; so thanks for your work.)

Every so often I will update my branch and make sure this patch applies (because I can't use mutt without it). If you are actively tracking the official repo, you might consider pulling my xlabel branch.

GI