Print a more realistic usage message 'special_device' 'inode_number'.  This matches the synopsis given in the manual page.
Print a more realistic usage message 'special_device' 'inode_number'.  This
matches the synopsis given in the manual page.

MFC after:	3 days

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