Fixup the mailman support so that instead of using @emulab.net
addresses in the list, use real email addresses. Why? Well, cause I'm a dope. Oh, the real reason is that people cannot post to the lists if we use their @emulab.net addresses cause we close the lists (to avoid spammers). I did it this way originally cause it was easier; there is a lot more bookkeeping to do if using real addresses, and I never consider problem of not being able to post.
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