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spdx: The BSD-2-Clause-NetBSD identifier is obsolete, drop -NetBSD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

spdx: The BSD-2-Clause-NetBSD identifier is obsolete, drop -NetBSD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

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MFHead@r345275

Fix build for KLD dyn_sysctl example

Looks like the example was broken by change of SYSCTL_STATIC_CHILDREN
definition in r267992. Fix build by switching to using SYSCTL_ADD_ROOT_NODE

PR: 236139
Su

Fix build for KLD dyn_sysctl example

Looks like the example was broken by change of SYSCTL_STATIC_CHILDREN
definition in r267992. Fix build by switching to using SYSCTL_ADD_ROOT_NODE

PR: 236139
Submitted by: Andrew Reiter <arr@watson.org>
MFC after: 1 week

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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

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.

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MFC @ r241285

IFC @ r242684

Sync from head

Revert previous commit...

Pointyhat to: kevlo (myself)

Prefer NULL over 0 for pointers

Merge head r233826 through r239173.

Minor style(9) improvement

Fix a few more SYSCTL_PROC() that were missing a CTLFLAG type specifier.

Merge from head

- Merge from HEAD

Resync with head.

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

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

Unbreak by syncing with changes in <sys/sysctl.h> macros.

These patches implement dynamic sysctls. It's possible now to add
and remove sysctl oids at will during runtime - they don't rely on
linker sets. Also, the node oids can be referenced by more than
on

These patches implement dynamic sysctls. It's possible now to add
and remove sysctl oids at will during runtime - they don't rely on
linker sets. Also, the node oids can be referenced by more than
one kernel user, which means that it's possible to create partially
overlapping trees.

Add sysctl contexts to help programmers manage multiple dynamic
oids in convenient way.

Please see the manpages for detailed discussion, and example module
for typical use.

This work is based on ideas and code snippets coming from many
people, among them: Arun Sharma, Jonathan Lemon, Doug Rabson,
Brian Feldman, Kelly Yancey, Poul-Henning Kamp and others. I'd like
to specially thank Brian Feldman for detailed review and style
fixes.

PR: kern/16928
Reviewed by: dfr, green, phk

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- Merge from HEAD

Resync with head.

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

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

Unbreak by syncing with changes in <sys/sysctl.h> macros.