Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

MFV: zstd 1.5.2

Merge commit 'b3392d84da5bf2162baf937c77e0557f3fd8a52b' into zstd_1.5.2

full changelog: https://github.com/facebook/zstd/compare/v1.4.8...v1.5.2

Updated sys/kern/subr_compressor.c to new API

MFC after: 3 days
Relnotes: yes
Sponsored by: Klara, Inc.

zstd: build with C11

This enables thread-aware timers which in turn fixes benchmark result
reports.

Reviewed by: cem
Differential Revision: https://reviews.freebsd.org/D34238

Only set WARNS if not defined

This would allow interested parties to do experimental runs with an
environment set appropriately to raise all the warnings throughout the
build; e.g. env WARNS=6 NO_WERROR=yes buildworld.

Not currently touching the numerous instances in ^/tools.

MFC after: 1 week

Update to Zstandard 1.4.0

The full release notes can be found on Github:

https://github.com/facebook/zstd/releases/tag/v1.4.0

Relnotes: yes

Update to Zstandard 1.3.8

This merge brings in a couple new files, which needed to be attached to the
build; a new dependency on <limits.h>, which must be stubbed; and a name
change in the Context parameter constants, from ZSTD_p_foo to ZSTD_c_foo.

Significantly, it fixes a kernel build error with GCC where floating-point
functions were included in the kernel build, by hiding them under the same
compile-time #ifdef that already covered their invocation. That issue was
introduced to FreeBSD in the 1.3.7 update and tracked upstream here:

https://github.com/facebook/zstd/issues/1386

The full 1.3.8 release notes can be found on Github:

https://github.com/facebook/zstd/releases/tag/v1.3.8

Relnotes: yes

Use a script wrapper for <compress>grep

Import the wrapper script from zstdgrep (written by wiz@netbsd.org)

Modify it to support more than just zstd (adding support for gzip,
lzma, xz and bzip2)

Write a simple manpage dedicated for it.

Only use that new wrapper both for gnu grep and bsd grep

Next step will be removing code related to compression format from bsdgrep

Reviewed by: kevans
Approved by: kevans
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D15193

Move zstd from contrib to sys/contrib so it can be used in the
kernel. Adjust the Makefiles that referenced it to the new path.

Sponsored by: Netflix
OK'd by: cem@ and AllanJude@

Build zstandard with threading enabled

Add a zstdmt which is equivalent as running zstd -T0

Import Zstandard 1.2.0

Among new things it is now threaded by default, use zstd -T# to chose the
number of threads not that -T0 will automatically determine the number of
threads based on the number of CPU online.

Install the zstdgrep shell wrapper

Add forgotten links for zstdcat and unzstd

Import zstandard 1.1.4 in base

zstandard is a new compression library/tool which is very fast at
compression/decompression

For now import as a private library

zstd: build with C11

This enables thread-aware timers which in turn fixes benchmark result
reports.

Reviewed by: cem
Differential Revision: https://reviews.freebsd.org/D34238

Only set WARNS if not defined

This would allow interested parties to do experimental runs with an
environment set appropriately to raise all the warnings throughout the
build; e.g. env WARNS=6 NO_WERROR=yes buildworld.

Not currently touching the numerous instances in ^/tools.

MFC after: 1 week

Use a script wrapper for <compress>grep

Import the wrapper script from zstdgrep (written by wiz@netbsd.org)

Modify it to support more than just zstd (adding support for gzip,
lzma, xz and bzip2)

Write a simple manpage dedicated for it.

Only use that new wrapper both for gnu grep and bsd grep

Next step will be removing code related to compression format from bsdgrep

Reviewed by: kevans
Approved by: kevans
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D15193

Move zstd from contrib to sys/contrib so it can be used in the
kernel. Adjust the Makefiles that referenced it to the new path.

Sponsored by: Netflix
OK'd by: cem@ and AllanJude@

Build zstandard with threading enabled

Add a zstdmt which is equivalent as running zstd -T0

Install the zstdgrep shell wrapper

Add forgotten links for zstdcat and unzstd