Remove copyright strings ifdef'd out

We've ifdef'd out the copyright strings for some time now. Go ahead and
remove the ifdefs. Plus whatever other detritis was left over from other
recent removals.

Remove copyright strings ifdef'd out

We've ifdef'd out the copyright strings for some time now. Go ahead and
remove the ifdefs. Plus whatever other detritis was left over from other
recent removals. These copyright strings are present in the comments and
are largely from CSRG's attempt at adding their copyright to every
binary file (which modern interpretations of the license doesn't
require).

Sponsored by: Netflix

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sbin: 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

sbin: 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

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Purge more stray embedded $FreeBSD$ strings

These do not use __FBSDID but instead use bare char arrays.

Reviewed by: imp, emaste
Differential Revision: https://reviews.freebsd.org/D41957

Add support for mounting single files in nullfs

My main use-case for this is to support mounting config files and secrets
into OCI containers. My current workaround copies the files into the
contain

Add support for mounting single files in nullfs

My main use-case for this is to support mounting config files and secrets
into OCI containers. My current workaround copies the files into the
container which is messy and risks secrets leaking into container images
if the cleanup fails.

Reviewed by: mjg, kib
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D37478

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mount_nullfs: rename a local variable

The "source" variable was introduced in r26072, probably as the
traditional counterpart to "target". But the "source"/"target" names
suggest the opposite of th

mount_nullfs: rename a local variable

The "source" variable was introduced in r26072, probably as the
traditional counterpart to "target". But the "source"/"target" names
suggest the opposite of their actual meaning. With ln, for example, the
source is the real file and the target is the newly created link. In
mount_nullfs the meaning is the opposite: the target is the existing
file system and the source is the newly created mountpoint. Better to
use "target"/"mountpoint" terminology, which matches the man page.

MFC after: 6 weeks
Sponsored by: Axcient

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Remove the check that prevents creating "loops" from mount_nullfs(8).

Reviewed by: kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D269

Remove the check that prevents creating "loops" from mount_nullfs(8).

Reviewed by: kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26921

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Merge ^/head r325999 through r326131.

General 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 f

General 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.

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Merge ^/head r314420 through r314481.

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

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

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IFC @253398

Merge fresh head.

sync from head

MFC @248093

GC unused variables. Prefer NULL over 0 for pointers.

IFC @247348.

Sync with HEAD.

IFC @ r245178

Allow to specify "cache" and "nocache" as an option for
mount_nullfs(8).

Tested by: pho
MFC after: 2 weeks

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

IFC @230489 (pending review).

Change checkpath() to not exit on error. This is a prerequisite for
fixing the mount(8) "failok" option.

PR: 163668
Reviewed by: Garrett Cooper, delphij (previous version)

IFC @ r227804

Pull in the virtio drivers from head.

Add missing static keywords for global variables to tools in sbin/.

These tools declare global variables without using the static keyword,
even though their use is limited to a single C-file, or wit

Add missing static keywords for global variables to tools in sbin/.

These tools declare global variables without using the static keyword,
even though their use is limited to a single C-file, or without placing
an extern declaration of them in the proper header file.

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IFH@204581