In some mail I received from Jonathan Stone, sie wrote
> 
> It's not just in-kernel; AFS uses some of these fields these show up
> on-disk as well, at least in AFS volumes on the server. (newer
> versions may do it differently).  jtk points out there was no AFS
> server-side release for NetBSD; i don't know if anyone ever built one
> `unofficially'.
> 
> Maybe breaking AFS server compatibility is the right thing, but we
> should be aware we're doing that, and/or make it an option.

Well, my hope would be, that if there is some sort of finite usage of
those bits that an appropriate (set of) bit pattern(s) could be somehow
"reserved" for AFS compatibility.  If arbitary values go there, that
would sort of void this idea.

Darren