- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC r264400,r265836:

r264400:

NO_MAN= has been deprecated in favor of MAN= for some time, go ahead
and finish the job. ncurses is now the only Makefile in the tree that
uses it since it wasn't a simple mechanical change, and will be
addressed in a future commit.

r265836:

Remove last two NO_MAN= in the tree. In both of these cases, MAN= is
what is needed.

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

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

Conform style.Makefile(5) and replace = and += with ?=, which lets you to
override WARNS.

Reported by: <marius@nuenneri.ch> and uqs@

Include unistd.h for read(), write() and stdlib.h for exit().
Bump WARNS to 5 while being here.

Start the dreaded NOFOO -> NO_FOO conversion.

OK'ed by: core

Fix the cdev kld example.

PR: 52954
Submitted by: Priit Piipuu <priit.piipuu@mail.ee>
Reviewed by: phk

Fix cdev kld example after it has been broken for year or so. Also extend list
of supported operations by example read() and write() operations.

Inspired by: http://www.daemonnews.org/200010/blueprints.html
PR: 16173
Submitted by: sobomax

$Id$ -> $FreeBSD$

Sample modules for KLD.

PR: misc/8621
Submitted by: Rajesh Vaidheeswarran <rv@fore.com>