Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

POSIX patch(1) would treat -b as different meaning (the functionality
is to be provided by --suffix). Looking at the usage here in diffutils,
it seems that we can just get rid of the -b .orig stuff. This resolves
a problem that can triggered if we move toward to a more permissively
licensed patch(1) program.

Update build skeleton after diffutils 2.8.7 update.

Remove getopt*.c, we already have compatible getopt_long() in libc

Make minimal changes to point the users to the Texinfo documentation
for more detailed information about sdiff(1). Hopefully this will
make it easier to find how `interactive merging' works with sdiff.

PR: docs/30618
Submitted by: mark@summersault.com

$Id$ -> $FreeBSD$

Switch to contrib version

Update to GNU diffutils 2.6

From: Larry Jones <scjones@thor.sdrc.com>
Subject: man pages for diff et al.

I finally got tired of not having man pages for diff and friends, so I
edited the appropriate sections of the texinfo manual into man format.

Update diff, diff3, and sdiff's makefiles to use .PATH: instead of
copying the same files to multiple directories. This should make
things easier when it comes time to update to a newer version of
diffutils.

With this checkin, this brings the netbsd and freebsd diff dists
into sync.