coova-chilli: execute firewall cleanup at shutdown

Coova Chilli creates "undo" firewall scripts that are intended to be run
when the daemon is shut down. Failure to do so results in leftover
entries in firewall and duplicated ones if chilli is subsequently
restarted.

Execute these scripts when the service stops.

Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>

net/coova-chilli/files/chilli.init

@@ -78,6 +78,9 @@ start_service() {
 }
 
 stop_service() {
+	for undofile in /var/run/chilli.tun*.sh; do
+		sh $undofile >& /dev/null
+	done
 	rm -f /var/run/chilli_*
 }