Deduce the "fstype" parameter to pass to nmount() by looking at the "_nfs" part of argv[0].  This should facilitate unifying mount_nfs and mount_nfs4 into one binary.
Deduce the "fstype" parameter to pass to nmount() by looking at
the "_nfs" part of argv[0].  This should facilitate unifying mount_nfs
and mount_nfs4 into one binary.

MFC after:	1 month
Reviewed by:	mohans

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