Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC: r227309 (partial)

Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.

The SYSCTL_NODE macro defines a list that stores all child-elements of
that node. If there's no SYSCTL_DECL macro anywhere else, there's no
reason why it shouldn't be static.

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Rework the PS3 disk driver to support NCQ and do its DMA a little
differently.

Make this slightly less yelly about regions that the hypervisor protects
from us by not registering them as disks.

Driver for PS3's internal hard disk. Hopefully this can be CAM-ified in
the future, but presents a set of simple block devices for now. With
(forthcoming) boot loader support or vfs.root.mountfrom, allows booting
PS3s from disk.

Submitted by: glevand <geoffrey.levand@mail.ru>