New support policy

[Sam Trenholme]

Due to a hectic work schedule, I no longer have time to personally
answer MaraDNS support email. I apologize for any inconvenience
caused. The only MaraDNS personal email I will answer is security bug
reports.

Please send all MaraDNS support concerns and feature requests to the
mailing list.  Please do NOT send MaraDNS support concerns to this
email address.

- Sam