main/djbdns: provide random seed to dnscache

fixes #120
Thanks to Nathan for solving this.

main/djbdns/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=djbdns
 pkgver=1.05
-pkgrel=28
+pkgrel=29
 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
-ea5d5ea807be2b7940ea67cc6dc50012  dnscache.initd
+62a12c34fdc6a184a14b206581fa8184  dnscache.initd
 e2938593277d7a87806e70e145a90c3f  dnscache.confd"

main/djbdns/dnscache.initd

@@ -9,6 +9,7 @@ PIDFILE=/var/run/dnscache.pid
 
 depend() {
 	need net
+	provide dns
 }
 
 #-----------------------------------------------------------------
@@ -28,7 +29,7 @@ start() {
 		--env "ROOT=$ROOT" --env "IP=$IP" --env "IPSEND=$IPSEND" \
 		--env "HIDETTL=$HIDETTL" --env "CACHESIZE=$CACHESIZE" \
 		--env "FORWARDONLY=$FORWARDONLY" --pidfile $PIDFILE \
-		--background --make-pidfile --exec $DAEMON 
+		--background --make-pidfile --exec $DAEMON -- < /dev/urandom
 	eend $?
 }