[OpenAFS] AFS on FreeBSD 6.1

[Jim Rees]

A few of us have worked on the FreeBSD client in the past, but no one is
working on it now.  To complete it, you would have to find someone willing
and able to do the work.  The remaining problems mostly have to do with
locking, vnode refcounting, and of course packaging.

If you are determined to try it, I would suggest looking at the OpenBSD
package builder for clues.  The OpenBSD and FreeBSD clients are similar.

The kernel module is in src/libafs/MODLOAD.  The afs.rc.fbsd script is old
and unlikely to work.  For testing all you need to do is load the kernel
module and start afsd.

I have fixed the top README to indicate that the FreeBSD client does not
work.