[pnfs] [PATCH 0/2]: minorvers option

[sager at netapp.com]

mount -t nfs4 -o minorvers=0 server:/path /mnt

minorvers defaults to 1.  I went with "minorvers" instead of "nfsvers"
(or "vers") partly because nfsvers isn't a valid option for type nfs4
but mostly because nfsvers is used for major versions.

One sidenote.  If the client tries to mount 4.1 against a 4.0 server, it
won't step back and try 4.0 for now (hopefully soon).  In this case,
the mount actually hangs as there seems to be some recovery issues on
the client when something goes wrong (I've seen this in other instances
as well).  I'll take a look.