Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
mdoc: silence a few mandoc lint warnings.
Driver 'aacraid' added. Supports Adaptec by PMC RAID controller families Series 6, 7, 8 and upcoming products. Older Adaptec RAID controller families are supported by the 'aac' driver.Approved by: scottl (mentor)