Change nfdhcpd.ferm to support bridged clients

Mangle packets comming from all interfaces and not only from taps
Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>

nfdhcpd.ferm

 domain ip {
 	table mangle {
 		chain PREROUTING {
-			interface tap+ proto udp dport 67 NFQUEUE queue-num 42;
+			proto udp dport 67 NFQUEUE queue-num 42;
 		}
 	}
 }
@@ -9,8 +9,8 @@ domain ip {
 domain ip6 {
 	table mangle {
 		chain PREROUTING {
-			interface tap+ proto icmpv6 icmpv6-type router-solicitation NFQUEUE queue-num 43;
-			interface tap+ proto icmpv6 icmpv6-type neighbour-solicitation NFQUEUE queue-num 44;
+			proto icmpv6 icmpv6-type router-solicitation NFQUEUE queue-num 43;
+			proto icmpv6 icmpv6-type neighbour-solicitation NFQUEUE queue-num 44;
 		}
 	}
 }