llvmdev offline for testing

Dear All,

The llvmdev mailing list will be going offline now for some testing of
mail delivery time. We'll be temporarily disabling email to several
users to see if sending mail to their domain is slowing down the list
server's delivery time. Most of you will receive some test messages;
you can safely ignore those.

We should be done in about 20 minutes. I'll email when we're done.

Thanks for your patience.

-- John T.