reminder: mailing list server downtime

The machine room that lists.openbsd.org will be undergoing maintenance
Saturday April 18th.  As a reasult, the list server will be taken
down at 5:30am MDT.  The current estimate is that everything will
be back up between 3-5pm MDT.

This also affects ftp.usa.openbsd.org and anoncvs3.usa.openbsd.org
which are located in the same machine room.