- 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)

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

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

mdoc: order prologue macros consistently by Dd/Dt/Os

Although groff_mdoc(7) gives another impression, this is the ordering
most widely used and also required by mdocml/mandoc.

Reviewed by: ru
Approved by: philip, ed (mentors)

Remove a bogus NOTES section. Move that content elsewhere.

Approved by: des (mentor), re (scottl)

mdoc(7) police:

- logically sort the SYNOPSIS section
- add missing markup bits
- "brackets" -> "parentheses"

Update function definitions and required include files to reflect
the current state of the system.

Approved by: alfred

Removed whitespace at end-of-line; no content changes. I simply did
cd src/share; find man[1-9] -type f|xargs perl -pi -e 's/[ \t]+$//'

BTW, what editors are the culprits? I'm using vim and it shows
me whitespace at EOL in troff files with a thick blue block...

Reviewed by: Silence from cvs diff -b
MFC after: 7 days

Abuse .Fn for macros better (don't hand-format the parameter string by
quoting it all and adding commas).

Don't say that the expression in KASSERT() is an int. It is a collection
of tokens forming a C expression that can be compared with 0.

Minor style fixes: freebsd.org -> FreeBSD.org

Remove trailing comma.

As bde was kind to point out:
"Man pages shouldn't refer to higher level interfaces
built using the interfaces in the man pages."

Submitted by: bde

Fix lameness I introduced by typing the Xr as a filename, sigh.

Fix EXAMPLE -> EXAMPLES.
Add Xr's for SPLASSERT and CONDSPLASSERT.

Assorted bag o' fixes:
fix Jonathan's name, fix copyright date, man -> manual,
add const before char *msg, add email address.

Document the KASSERT() macro.