mwan3: change flush_conntrack handling to use uci list element

With this change it is now possible to combine interface action events.
If an interface action is generated by netifd or mwan3 for example ifup,
ifdown, connectd or disconnected and this action is configured in the inteface
uci section, then the conntrack table is flushed by mwan3.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

net/mwan3/files/etc/hotplug.d/iface/15-mwan3

@@ -79,7 +79,6 @@ case "$ACTION" in
 		fi
 		mwan3_set_policies_iptables
 		mwan3_set_user_rules
-		mwan3_flush_conntrack $INTERFACE $DEVICE "ifup"
 	;;
 	ifdown)
 		mwan3_set_iface_hotplug_state $INTERFACE "offline"
@@ -87,7 +86,6 @@ case "$ACTION" in
 		mwan3_track_signal $INTERFACE $DEVICE
 		mwan3_set_policies_iptables
 		mwan3_set_user_rules
-		mwan3_flush_conntrack $INTERFACE $DEVICE "ifdown"
 	;;
 esac
 

net/mwan3/files/etc/hotplug.d/iface/16-mwan3

@@ -14,4 +14,9 @@ if [ "$ACTION" == "ifup" ]; then
 	mwan3_unlock "$ACTION" "mwan3rtmon"
 fi
 
+config_get enabled $INTERFACE enabled 0
+[ "${enabled}" = "0" ] || {
+	mwan3_flush_conntrack "$INTERFACE" "$ACTION"
+}
+
 exit 0