- 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

Assorted markup, grammar, and spelling fixes.

add section name

Approved by: Nate Lawson

Fix output from an error message.
Use sysctl -n instead of sed

Submitted by: Scott Lambert <lambert@lambertfam.org>

Assorted mdoc(7) fixes:

- Use .Tn for ACPI/APM acronyms
- Sort SEE ALSO entries by section
- Add AUTHORS section

Reviewed by: des (mentor)
OK'ed by: njl

Move the zzz utility to its own directory since it is no longer dependent
on apm(8)