Fix resolution speed

[jmuchovej]

While consolidating the Corefile (as below) makes maintenance easy, it seems like it overall slows down connection resolving.

zerodns/root/app/Corefile

Lines 1 to 10 in 00862d0

	.:5353 {
	errors
	log
	hosts /config/hosts {
	reload 15m
	fallthrough
	}
	forward . /etc/resolv.conf
	reload 15m
	}

I'm not sure if this is because of all the aliases generated (at least 6 per IP address), or if these some kind of timeout to be tweaked. So far, question has been asked on CoreDNS's Discussion board.