Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
$Id$ -> $FreeBSD$
Add (BSD) copyright headers.
Change [-DMHW [+|-]val] to [-v [+|-]val[ymwdHM]]Support Hours & MinutesAdd -Wall to Makefile
Add [-DWMY] flags for date adjustment.Discussed with: freebsd-hackers