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

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

spdx: The BSD-2-Clause-NetBSD identifier is obsolete, drop -NetBSD

The SPDX folks have obsoleted the BSD-2-Clause-NetBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

sys/dev: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

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.

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

Remove license clauses 3 and 4 as per rev. 1.65 of auvia.c in NetBSD.

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

Add defines for low power and second codec ready.

Attempt a hard reset if AC97 codec is not ready on attach.

Halt attach if mixer_init fails.

Prompted by: points raised by Hugo Valentim <hvalentim@gmx.net>.

Remove support for the vt8233. Specs for chipset changed mid-revision
so this code was not working for the newer VIA chipsets.

Add support for VT8233.

move parametric defines and structure definitions from .h to .c

new driver: via 82c686 chipset audio

not personally tested, but i'm assured it works

Submitted by: David Jones <dej@ox.org>
PR: kern/20161