- 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 r258826, r259555, r 259558:

libcpp: Merge fixes from upstream
Fixes:
GCC preprocessor/29966:
GCC preprocessor/28709:
GCC c/31924
GCC preprocessor/14331

gcc: add Apple-compatible -Wnewline-eof

Obtained from: gcc per-4.3 (rev. 121340, 124356, 124358, 124730,
125212, 125255 ; GPLv2)
Apple Inc. (Apple GCC 4.2 - 5531)

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

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

This commit was generated by cvs2svn to compensate for changes in r169695,
which included commits to RCS files with non-trunk default branches.

GCC 4.2.0 release miscellaneous support libraries.