Adds *-class-*@domain to mailman aliases for *-teachers@domain to hopefully quash silly bounce-wars.
Adds archive list to class mailing lists (to match section mailing lists).
Make class mailing lists add users with names, like section mailing lists do.
Removes some hard-coded @esp.mit.edus in dbmail/receivers.
Merge pull request #653 from benjaminjkraft/mailman-fixes

Mailman fixes