- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Clean up, comment out non-base utilities, fix up comments.

Prodded by: hrs

Give users the ability to load a mac_bsdextended(4) ruleset on boot (defaults
to NO of course). Provide a basic ruleset file, rc.bsdextended, but allow
the filename to be overridden through rc.conf.

Discussed with: rwatson (awhile ago)