The code to be found here is all stuff intended to be integrated with
2.3.

Currently, its a patch in progress against 2.2

You can get a copy of the defunct POSIX draft specification for
capabilities and some other interesting things here:

  http://www.guug.de/~winni/posix.1e/download.html

If you are looking for ACL patches for kernels, take a look here:

  http://aerobee.informatik.uni-bremen.de/acl_download.html

Cheers

Andrew