Pull up following revision(s) (requested by jmcneill in ticket #1160):
sys/dev/ic/mpt_netbsd.c: revision 1.26-1.31
sys/dev/ic/mpt.c: revision 1.17
share/man/man4/bio.4: revision 1.12
share/man/man4/mpt.4: revision 1.6
sys/dev/ic/mpt.h: revision 1.8
- Add bio(4) support.
- xref mpt(4) in bio(4).
- xref bio(4) in mpt(4).
- show "sd0" instead of "mpt0" for volume device name
- include vendor/product/rev info for volumes and their disks.
- for BIOCDISK_NOVOL, set bd_disknovol=true for any disk not associated with a
  volume for BIOCDISK_NOVOL, when setting bd_disknovol=false, also set
  bv_volid

(msaitoh)