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)

Update to improve handling of verbose PCI vendor/device information.

- Read the database from /usr/share/misc (or wherever else we're pointed)
rather than compiling it in.
- Decode the class/subclass fields if requested.
- Print things in a slightly longer but more readable format.

This commit was generated by cvs2svn to compensate for changes in r19102,
which included commits to RCS files with non-trunk default branches.

Initial version of the user land code for the PCI config register
access functions. Written by Garrett Wollman and modified by me to
better match my view of the (PCI) world.

Submitted by: wollman