Modify nfs_open() in the experimental NFS client to be compatible with the regular NFS client. Also, fix a couple of mutex lock issues.
Modify nfs_open() in the experimental NFS client to be compatible
with the regular NFS client. Also, fix a couple of mutex lock issues.

MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase