4.17 to 4.5

Since webfig seems broken in 5.1. May I request that you polish up 4.5 for the features I’d like to use, and bring it up to legacy? To be more specific I’d like the twofish support on ipsec.

we will not backport features to v4 as it’s not so easy, this would make the v4 identical to v5, only the version number would be different. these changes are what makes v5 different.