This is fix an issue with dnsmasq's RA that does not set the "on-link" bit, making all local IPv6 traffic go to the router then to the destination host, not directly to each other.
patch is from dnsmasq git
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33216 3c298f89-4303-0410-b956-a3cf2f4a3e73
