We don't need resolved and it is sometimes buggy so let's just get rid
of it and use unbound like we do on our mail machines already.

Details: https://kanboard.archlinux.org/public/task/104/7dd7510424e4229247e8e0b90bf43e1553fce86cdf8475b60edc956ed5a8



Signed-off-by: Florian Pritz <bluewind@xinu.at>