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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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

Fix syscall kld example

PR: 255936
Reported by: splitface@mailfence.com
Approved by: gbe (mentor), imp@, jilles@
Differential Revision: https://reviews.freebsd.org/D30498

share and pc-sysinstall: 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.

Commit these apart because compile testing doesn't guarantee I didn't made
some nasty mistake. No functional change intended.

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

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

Where if not in examples we should follow style(9)?

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

Include the <sys/sysproto.h> header which includes the prerequisite header
for AUE_NULL.

Approved by: re (kensmith)

According to module(9), when command is unrecognized, the module should
return EOPNOTSUPP.

Update the KLD examples so they will work with current.

Reviewed: jhb

$Id$ -> $FreeBSD$

Replace the misc example with a simpler syscall example using the new
module registration hooks for syscalls.

Submitted by: Assar Westerlund <assar@sics.se>