Make a checkbox to enable incoming IPv6 connections to home network

[Bruno Pitrus]

The default Tomato configuration drops incoming IPv6 connections to PCs on the home network, which inhibits P2P applications such as filesharing and videocalls and breaks the end-to-end principle of the internet. Make a checkbox which would do the equivalent of adding these two lines to the “WAN Up” script:

#Disable firewall on ip6
ip6tables -F wanin
ip6tables -A wanin -j ACCEPT