- 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

Move another block of ASUS events to devd/asus.conf that were missed in r186249

Add /etc/devd/ and move hardware specific configuration there. This makes it
easier to maintain custom rules for non-system things like ACPI hotkeys.

/etc/devd.conf is already set up to check this directory, no change needed there.