6rd is worse without these, kernel panic on connecting WAN. I believe the original commit did break things for some people that worked before that commit, but these patches cannot be removed on their own at this time.
 Revert "This appears to have broken some 6rd. Revert "Allow specifying a prefixlen for ipv4 address embedded. With it for normal operation is required to specify the other value of the ipv4 prefix. With it allow more than one stf instance to exist without bringing the others down""

This reverts commit 2c9bff1efdb465a1755b57a2374fd36345d3b998.
6rd is worse without these, kernel panic on connecting WAN. I believe the original commit did break things for some people that worked before that commit, but these patches cannot be removed on their own at this time. Revert "This appears to have broken some 6rd. Revert "Ooops correct value here""

This reverts commit f4104eba6aa90fff352536a235fb4a355660c42c.