sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

sys: Remove $FreeBSD$: one-line .h pattern

Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

Remove pc98 support completely.
I thank all developers and contributors for pc98.

Relnotes: yes

Remove vestiges of knowing the ISA bus, which we gave up on around 20
years ago. Remove redunant copy of isaregs.h.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

- Import the HEAD csup code which is the basis for the cvsmode work.

- Move bus dependent defines to {isa,cbus}_dmareg.h.
- Use isa/isareg.h rather than <arch>/isa/isa.h.

Tested on: i386, pc98

- Move timerreg.h to <arch>/include and split i8253 specific defines into
i8253reg.h, and add some defines to control a speaker.
- Move PPI related defines from i386/isa/spkr.c into ppireg.h and use them.
- Move IO_{PPI,TIMER} defines into ppireg.h and timerreg.h respectively.
- Use isa/isareg.h rather than <arch>/isa/isa.h.

Tested on: i386, pc98

Remove unused IO_NPX* defines.

Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson

Clean up some antique stuff. We do not support Weitek FPUs etc, and never
did.

Correct error message.

Break out the bus front ends into their own files. Rewrite
sio_pccard_detach to use new siodetach. Add an extra arg to sioprobe
to tell driver to probe/not probe the device for IRQs.

This incorporates most of Bruce's review material. I'm at a good
checkpoint, but there will be more to come based on bde's further
reviews.

Reviewed by: bde

Add smc37c935 chipset support and clean up the code which tries to
allocate a short port range in some alpha configurations.

Submitted by: "Andrew M. Miklic" <miklic@udlkern.fc.hp.com>,
Mark Abene <phiber@radicalmedia.com>

Port ppc driver to alpha.

Submitted by: Andrew M. Miklic <miklic@ibm.net>

$Id$ -> $FreeBSD$

* Add ivars for ISA pnp.
* Move isa_dma* declarations to isavar.h.
* Add a method ISA_DELETE_RESOURCE() to the ISA interface.
* Tidy up include protection defines.

Move IO_PSMSIZE from kbdio.h to isareg.h.

While I am here, correct the values for IO_MDASIZE and IO_CGASIZE; they
should be 12 rather than 16.

Support files for ISA bus.