- 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)

Revert r279010:
tdelete(3): don't delete the node we are about to return.

The original change, from NetBSD, was bogus; introduced a memory
leak and and broke POSIX. By reverting we actually match NetBSD's
latest revision.

This is a direct commit to 10 since this function was rewritten
in 11-current.

Reported by: Markiyan Kushnir
Obtained from: NetBSD (CVS rev. 1.7, 1.8)

MFC r278301, r278315:
tdelete(3): don't delete the node we are about to return.

CID: 272528
Obtained from: NetBSD (CVS rev. 1.4)

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

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

No need to include <assert.h> here.

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.

Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.

Remove __P() usage.

bring in binary search tree code.

Obtained from: NetBSD