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)

Use __FBSDID().
Also some minor style cleanups.

Cleanup warnings. Most of these are signed/unsigned warnings, as well as
some added const's.

$Id$ -> $FreeBSD$

Export an interface for presetting the ISA PnP read port address.
Make the EISA ID formatter generally available

Make ISA PnP work. This successfully enumerates as many ISA devices as I
can fit into my test machine.

- Move to using STAILQs rather than ad-hoc singly-linked lists.
- Use a mostly procedural interface to the PnP information. This
improves data-hiding.

Implement a new linker-set technique (currently on i386 only but should work
on Alpha as well). This is a good candidate for replacing the current
gensetdefs cruft completely.

console.c
Allow the MI code to override the preferred console (eg. so that
an RB_SERIAL flag from the i386 boot2 can override the default
first active console)

isapnp.c
Use the standard format for ISA PnP IDs.

pnp.c
Allow trailing comments on lines, be less picky about line
contents.

ls.c
Cosmetic error message fix.

panic.c
Print the right arguments.

Oops, missed these. Machine-independant ISA PnP enumerator.