- 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

Remove various and sundry NetBSDism's in preparation for adding locking.

Start each of the license/copyright comments with /*-, minor shuffle of lines

Added NEC PC-9801-83, 84, PC-9801-103, 104, PC-9801N-25 and PC-9801N-J02R
support which use National Semiconductor DP8393X (SONIC) as ethernet
controller. Currently, this driver is used on only PC-98.

Submitted by: Motomichi Matsuzaki <mzaki@e-mail.ne.jp>
Obtained from: NetBSD/pc98