cache-domains: Changed to hotplug script

Since we have to restart dnsmasq to reload the config anyway, this
package doesn't need to run before anything. We do however need to
wait for the network so I've changed this service to be a hotplug
script and utility script.

Signed-off-by: Gerard Ryan <G.M0N3Y.2503@gmail.com>

utils/cache-domains/files/30-cache-domains

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+source /lib/functions/network.sh
+network_find_wan WAN_IFACE
+
+if [ "${ACTION}" == "ifup" ] && [ "${INTERFACE}" == "${WAN_IFACE}" ] && [ ! -d /var/cache-domains ]; then
+	/usr/bin/cache-domains configure
+fi