- 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

Remove trailing whitespace per mdoc lint warning

Disussed with: gavin
No objection from: doc
Approved by: joel
MFC after: 3 days

Add the ability to set SMU-based machines to restart automatically after
power loss.

Fix two bugs in this manpage: 'System' is not abbreviated with 'P',
and a non-useful version of smu(4) was in 8.0, so modify the history
to reflect that.

Submitted by: gavin

Add a manpage for smu(4) now that it does something useful.