Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Reencode files from latin1 to UTF-8.

Add a -c option to control caddr_t replacement (which was commented out in
the previous revision)

Add a script that converts K&R-style function definitions to ANSI style.