- 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

twalk() expects an `action' function not a comparison function.
The text is correct in the "DESCRIPTION" section, so fix "SYNOPSIS"
to use the correct name.

PR: docs/90498
Submitted by: Vasil Dimov
MFC after: 3 days

Sort sections.

Mechanically kill hard sentence breaks.

mdoc(7) police: "The .Fa argument.".

mdoc(7) police: "The .Fn function".

Add missing const qualifier in tfind().

Style: One space between "restrict" qualifier and "*".

- Add the 'restrict' qualifier to match the IEEE Std 1003.1-2001
prototype of the tdelete(3) function.
- Remove duplicated space.
- Use an ANSI-C function definition for tdelete(3).
- Update the manual page.

Move to using .In instead of .Fd #include <> for include mark-up.

Inspired by comment from: dd

Remove whitespace at EOL.

Fixed C error(s) in synopsis. Many were hiding under mdoc errors.

mdoc(7) police: split punctuation characters + misc fixes.

Fixed typo not fixed in previous revision.

Fixed typos.

bring in binary search tree code.

Obtained from: NetBSD