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

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

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

Approved by: re (implicit)

Remove 3rd clause, per email from bms

Update copyright date.

MFC after: 3 weeks

Use C99 types.

MFC after: 3 weeks

Rewrite the format of pirtool output to match what the kernel currently
prints out if bootverbose is set. This is to facilitate the code being
removed from the kernel at a later date.

While we're here, fix the __packed structures, and add some other
PCI interrupt router IDs.

Submitted by: jhb (with some tweaks)
MFC after: 3 weeks

Fix a masking error. Update copyright.

Add pirtool, a tool for dumping the $PIR table on i386 machines at runtime.

Requested by: mdodd