main/djbdns: fix dnscache init script

to not set uncoditionally FORWARDONLY. just the mere existance of
the env variable changes dnscache behaviour. fixes #147.

main/djbdns/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=djbdns
 pkgver=1.05
-pkgrel=29
+pkgrel=30
 pkgdesc="Excellent high-performance DNS services"
 url="http://cr.yp.to/djbdns.html"
 license="public-domain"
@@ -82,5 +82,5 @@ c7be73fe2fb4ae02d5096fa2c1f55a68  1.05-errno.patch
 acf2f1689e299320d6670c491f4d4e97  tinydns.initd
 7dcf6674c07d46c736b3c25d9c92384a  tinydns.confd
 e09c3a6ba6917e16f4736ab5c070dbe9  dnscache.pre-install
-62a12c34fdc6a184a14b206581fa8184  dnscache.initd
+745220591c11b27cf20df0509e2ae9c8  dnscache.initd
 e2938593277d7a87806e70e145a90c3f  dnscache.confd"

main/djbdns/dnscache.initd

@@ -24,11 +24,15 @@ start() {
 		eend 1 "dnscache user or group missing"
 		return 1
 	fi
+
+	OPTS=""
+	[ "$FORWARDONLY" ] && OPTS="$OPTS --env FORWARDONLY=$FORWARDONLY"
+	[ "$HIDETTL" ] && OPTS="$OPTS --env HIDETTL=$HIDETTL"
+	[ "$CACHESIZE" ] && OPTS="$OPTS --env CACHESIZE=$CACHESIZE"
 	
 	start-stop-daemon --start --env "UID=$UID" --env "GID=$GID" \
 		--env "ROOT=$ROOT" --env "IP=$IP" --env "IPSEND=$IPSEND" \
-		--env "HIDETTL=$HIDETTL" --env "CACHESIZE=$CACHESIZE" \
-		--env "FORWARDONLY=$FORWARDONLY" --pidfile $PIDFILE \
+		$OPTS --pidfile $PIDFILE \
 		--background --make-pidfile --exec $DAEMON -- < /dev/urandom
 	eend $?
 }