[MARA] Zoneserver mararc dns_port patch

[Sam Trenholme]

> OK, I've got the patch to apply.  I will now do some testing to see if
> the patch breaks anything, and release a MaraDNS snapshot later on
> today.

Done.

http://www.maradns.org/download/1.3/snap/200902

Testing would be appreciated (It passed the standard automated
regression and -Wall is as quiet as a mouse in both CentOS 5.2 and
Ubuntu 8.10 64-bit) :)

- Sam