rc.d/zfs: pass -v option to zfs mount
rc.d/zfs: pass -v option to zfs mount

this should make boot process more informative (and entertaining)
on systems with lots of zfs filesystems.

MFC after:	7 days

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