[OpenAFS] Mount points for .backup volumes

[Jeffrey Hutzelman]

On Mon, 30 Jul 2001, Nickolai Zeldovich wrote:

> > Actually, ELOOP is returned when the number of symbolic links followed is
> > greater than the system defined limit, meaning the client was in fact
> > traversing the mount points recursively.
> 
> I think this behavior might've changed recently; EvalMountPoint() in
> afs/VNOPS/afs_vnop_lookup.c does infact return ELOOP when it sees a
> backup volume mountpoint in a backup volume (but recursive traversal
> of non-backup volumes is actually ok):

A quick check of my CVS repository shows that this behaviour has been
present at least since AFS 3.3a.