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

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.

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sys/contrib/zstd: Import zstd 1.4.8

Merge commit 'f6ae97673c28bdb9ae795bd235ab6f26f2536a2d' into main

Changes from 1.4.5:
* https://github.com/facebook/zstd/releases/tag/v1.4.8
* https://github

sys/contrib/zstd: Import zstd 1.4.8

Merge commit 'f6ae97673c28bdb9ae795bd235ab6f26f2536a2d' into main

Changes from 1.4.5:
* https://github.com/facebook/zstd/releases/tag/v1.4.8
* https://github.com/facebook/zstd/releases/tag/v1.4.7
(and there was no public v1.4.6)

Conflicts:
sys/contrib/zstd/lib/common/zstd_internal.h (new ZSTD_NO_INTRINSICS)

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Update to Zstandard 1.4.5

As usual, the full release notes are found on Github:

https://github.com/facebook/zstd/releases/tag/v1.4.5

Notable changes include:

* Improved decompress performance o

Update to Zstandard 1.4.5

As usual, the full release notes are found on Github:

https://github.com/facebook/zstd/releases/tag/v1.4.5

Notable changes include:

* Improved decompress performance on amd64 and arm (5-10%
and 15-50%, respectively).
* '--patch-from' zstd(1) CLI option, which provides something like a very fast
version of bspatch(1) with slightly worse compression. See release notes.

In this update, I dropped the 3-year old -O0 workaround for an LLVM ARM bug;
the bug was fixed in LLVM SVN in 2017, but we didn't remove this workaround
from our tree until now.

MFC after: I won't, but feel free
Relnotes: yes

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Update to Zstandard 1.4.4

The full release notes can be found on Github:

https://github.com/facebook/zstd/releases/tag/v1.4.4

Notable changes in this release include improved decompression speed

Update to Zstandard 1.4.4

The full release notes can be found on Github:

https://github.com/facebook/zstd/releases/tag/v1.4.4

Notable changes in this release include improved decompression speed (about
10%). See the Github release notes for more details.

MFC after: I'm not going to, but feel free
Relnotes: yes

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Update to Zstandard 1.4.2

The full release notes for 1.4.1 (skipped) and 1.4.2 can be found on Github:

https://github.com/facebook/zstd/releases/tag/v1.4.1
https://github.com/facebook/zstd/rele

Update to Zstandard 1.4.2

The full release notes for 1.4.1 (skipped) and 1.4.2 can be found on Github:

https://github.com/facebook/zstd/releases/tag/v1.4.1
https://github.com/facebook/zstd/releases/tag/v1.4.2

These are mostly minor updates; 1.4.1 purportedly brings something like 7%
faster decompression speed.

Relnotes: yes

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MFHead @347527

Sponsored by: The FreeBSD Foundation

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

Merge ^/head r339015 through r339669.

Update to Zstandard 1.3.7

Relnotes: yes
Sponsored by: Dell EMC Isilon

Update to Zstandard 1.3.3

Includes patch to conditionalize use of __builtin_clz(ll) on __has_builtin().
The issue is tracked upstream at https://github.com/facebook/zstd/pull/884 .
Otherwise, these

Update to Zstandard 1.3.3

Includes patch to conditionalize use of __builtin_clz(ll) on __has_builtin().
The issue is tracked upstream at https://github.com/facebook/zstd/pull/884 .
Otherwise, these are vanilla Zstandard 1.3.3 files.

Note that the 1.3.4 release should be due out soon.

Sponsored by: Dell EMC Isilon

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Merge ^/head r325663 through r325841.

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@