- 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 r269534:

Integrate lib/libmp into the build/kyua

- Remove the .t wrapper
- Fix -Wreturn-type warnings with clang

This change has been tested on amd64/i386

Phabric: D530
Reviewed by: jmmv
Approved by: jmmv (co--mentor)
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division

MFC note: src.opts.mk in the original commit was changed to
bsd.own.mk.

Integrate lib/libmp into the build/kyua

- Remove the .t wrapper
- Fix -Wreturn-type warnings with clang

This change has been tested on amd64/i386

Phabric: D530
Reviewed by: jmmv
Approved by: jmmv (co-mentor)
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division