- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
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

Give fstest a more unique name: pjdfstest.
It is released from time to time and used outside FreeBSD, so it is good to
have a name one can google.

Add tests for mknod(2).

Submitted by: Jan Senolt <senoltj@centrum.cz>
Submitted by: Milan Cermak <Milan.Cermak@Sun.COM>
Polished by: pjd