I am generally against the "one big header file" approach, and
everything in the client includes this file.  Let's move all the NFS v3
declarations into a v3-only header file.
Signed-off-by: NAnna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>