Release errata & patch list

[justin at shiningsilence.com]

> And Matt,  currently I setup a filter on my mail that I think will grab
> all commits to a branch.  This works well enough for now. (sorry about
> sending this e-mail to you and not the list first)

Is the filter a procmail filter?  If not, how's it working?  We already
have procmail going through list mail to create the mailarchive on leaf;
it'd be a good fit for autocreating errata, then.