- 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 r273929:

r273929 (by jmmv):

MFV: Import atf-0.21.

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

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

Merge ATF 0.16 from vendor/atf/dist.

Provenance: http://code.google.com/p/kyua
Discussed with: gibbs, gnn, keramida, mdf, mlaier,
Discussed with: Garrett Cooper

Bootstrap dist directory from the initial import of ATF 0.16.

Import ATF version 0,16

Discussed with: gibbs, gnn, keramida, mdf, mlaier,
Discussed with: Garrett Cooper