bugfix: ip6tables rule removal

Three FORWARD chain rules are added and two INPUT chain rules
are added when a network is started but only the FORWARD chain
rules are removed when the network is destroyed.

src/network/bridge_driver.c

@@ -1578,6 +1578,8 @@ networkRemoveGeneralIp6tablesRules(struct network_driver *driver,
     if (!virNetworkDefGetIpByIndex(network->def, AF_INET6, 0))
         return;
 
+    iptablesRemoveUdpInput(driver->iptables, AF_INET6, network->def->bridge, 53);
+    iptablesRemoveTcpInput(driver->iptables, AF_INET6, network->def->bridge, 53);
     iptablesRemoveForwardAllowCross(driver->iptables, AF_INET6, network->def->bridge);
     iptablesRemoveForwardRejectIn(driver->iptables, AF_INET6, network->def->bridge);
     iptablesRemoveForwardRejectOut(driver->iptables, AF_INET6, network->def->bridge);