- handle NAT reflection in firewall hotplug, solves synchronizing issues on boot
- introduce masq_src and masq_dest options to limit zone masq to specific ip ranges, supports multiple subnets and negation
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22888 3c298f89-4303-0410-b956-a3cf2f4a3e73