Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Fix typos and spelling mistakes.
Add xrefs to gpib(3), now that it exists.MFC after: 3 days
Add man pages for the gpib(4), pcii(4), and tnt4882(4) drivers.MFC after: 3 days