Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Fix a small typo. Fireware -> firmware.MFC after: 2 weeks
Fix some style bugs.Submitted by: bde
Implement POSIX.1-2001 (XSI)'s fmtmsg(3).