- 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)

r261567: Build a 32-bit libstand under sys/boot/

A 32-bit libstand is needed on 64-bit platforms for use by various
bootloaders. Previously only the 32-bit version was built, installed
as /usr/lib/libstand.a.

A new 64-bit libstand consumer will arrive in the near future, so move
the bootloader-specific 32-bit version to sys/boot/libstand32/.

Explicitly link against this version in the 32-bit loaders.

r261614: Build a 32-bit libstand under sys/boot/ for ppc64

This change is equivalent to r261567 for i386/amd64.

Relnotes: Yes
Sponsored by: The FreeBSD Foundation

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

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

MF tbemd: move to using specific architecture makefiles