- 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)

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

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

Use libc's strndup() instead of Dtrace's reimplementation.

Corresponds partially to OpenSolaris change:
PSARC 2010/299 GNU/Linux/BSD compatibility functions
6901783 strndup would be nice

MFC after: 2 weeks

This commit was generated by cvs2svn to compensate for changes in r178479,
which included commits to RCS files with non-trunk default branches.

Vendor import of libraries for DTrace from OpenSolaris.