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

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

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD 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

sound: clean up empty lines in .c and .h files

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.

Use new OSS-based BSD-licensed header for cs sound driver.

The cs driver requires a table with firmware values. An
alternative firmware is available in a similar Open Sound
System driver. This is actually a partial revert of
Revision 77504.

Special thanks to joel@ for patiently testing several
replacement attempts.

The csa driver and the complete sound system are now free
of the GPL.

Tested by: joel
Approved by: jhb (mentor)
MFC after: 3 weeks

Minor cleanups to the csa snd driver.

Remove unneeded temporary variable (data) to better match the OSS code.
Remove some unused constants and type definitions.

Tested by: joel
Approved by: jhb (mentor)
MFC after: 3 weeks

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.

Implement suspend/resume operation for snd_csa(4)

PR: kern/82243
Submitted by: Serge Semenenko
Approved by: re (scottl)
MFC after: 1 month

update this driver to use new firmware and incorporate many fixes.

this works on cs4630 chips, and should implement the clkrun hack for
thinkpads- this will display diagnostic messages when triggered until its
correctness is established.

Make the origins clear.

Pointed out by: Tatoku Ogaito <tacha@trap.fukui-med.ac.jp>

- Introduce the bridge drivers for Sound Blaser, GUS and Crystal
Semiconductor CS461x/428x.
- Add support for GUS and CS461x/428x pcm.

Bridges reviewed by: dfr, cg
GUS non-PnP support submitted by: Ville-Pertti Keinonen <will@iki.fi>
GUS PnP support tested by: Michiru Saito <mich@mtci.ne.jp>