To prevent code duplication for clearing QoS firewall rules, support
"firewall stop" arguments to generate.sh to generate the necessary
script commands. Make use of this from qos-stop.
Signed-off-by: Kevin Locke <klocke@digitalenginesoftware.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28623 3c298f89-4303-0410-b956-a3cf2f4a3e73