A new security subsystem wiki

This has been a problem for the btrfs wiki, with its old btrfs.wiki.kernel.org location being static since the breakin and thus rather stale now, as well.

As a result, btrfs too has a newer, more updated wiki, tho without the nice official sounding domain name that the kernsec folks got, btrfs.ipv5.de (ipv5.de? Nice enough I guess, but WTF does it have to do with either filesystems or the linux kernel, kernsec.org, much more official sounding/looking! =:^):

http://btrfs.ipv5.de/index.php?title=Main_Page

There's talk of simply trying to get the old btrfs.wiki.kernel.org setup as a redirector, thus eliminating both the stale content of a previously well known and distributed link, and solving the unofficial looking domainname issue. I imagine such a solution would be useful for other wikis (including kernsec) that used to live at wiki.kernel.org as well.