Log Message:
zstd: update to 1.5.0.

v1.5.0  (May 11, 2021)
api: Various functions promoted from experimental to stable API: (#2579-2581, \ 
@senhuang42)
  `ZSTD_defaultCLevel()`
  `ZSTD_getDictID_fromCDict()`
api: Several experimental functions have been deprecated and will emit a \ 
compiler warning (#2582, @senhuang42)
  `ZSTD_compress_advanced()`
  `ZSTD_compress_usingCDict_advanced()`
  `ZSTD_compressBegin_advanced()`
  `ZSTD_compressBegin_usingCDict_advanced()`
  `ZSTD_initCStream_srcSize()`
  `ZSTD_initCStream_usingDict()`
  `ZSTD_initCStream_usingCDict()`
  `ZSTD_initCStream_advanced()`
  `ZSTD_initCStream_usingCDict_advanced()`
  `ZSTD_resetCStream()`
api: ZSTDMT_NBWORKERS_MAX reduced to 64 for 32-bit environments (@Cyan4973)
perf: Significant speed improvements for middle compression levels (#2494, \ 
@senhuang42 @terrelln)
perf: Block splitter to improve compression ratio, enabled by default for high \ 
compression levels (#2447, @senhuang42)
perf: Decompression loop refactor, speed improvements on `clang` and for \ 
`--long` modes (#2614 #2630, @Cyan4973)
perf: Reduced stack usage during compression and decompression entropy stage \ 
(#2522 #2524, @terrelln)
bug: Improve setting permissions of created files (#2525, @felixhandte)
bug: Fix large dictionary non-determinism (#2607, @terrelln)
bug: Fix non-determinism test failures on Linux i686 (#2606, @terrelln)
bug: Fix various dedicated dictionary search bugs (#2540 #2586, @senhuang42 \ 
@felixhandte)
bug: Ensure `ZSTD_estimateCCtxSize*() `monotonically increases with compression \ 
level (#2538, @senhuang42)
bug: Fix --patch-from mode parameter bound bug with small files (#2637, @occivink)
bug: Fix UBSAN error in decompression (#2625, @terrelln)
bug: Fix superblock compression divide by zero bug (#2592, @senhuang42)
bug: Make the number of physical CPU cores detection more robust (#2517, @PaulBone)
doc: Improve `zdict.h` dictionary training API documentation (#2622, @terrelln)
doc: Note that public `ZSTD_free*()` functions accept NULL pointers (#2521, \ 
@animalize)
doc: Add style guide docs for open source contributors (#2626, @Cyan4973)
tests: Better regression test coverage for different dictionary modes (#2559, \ 
@senhuang42)
tests: Better test coverage of index reduction (#2603, @terrelln)
tests: OSS-Fuzz coverage for seekable format (#2617, @senhuang42)
tests: Test coverage for ZSTD threadpool API (#2604, @senhuang42)
build: Dynamic library built multithreaded by default (#2584, @senhuang42)
build: Move  `zstd_errors.h`  and  `zdict.h`  to  `lib/`  root (#2597, @terrelln)
build: Allow `ZSTDMT_JOBSIZE_MIN` to be configured at compile-time, reduce \ 
default to 512KB (#2611, @Cyan4973)
build: Single file library build script moved to `build/` directory (#2618, \ 
@felixhandte)
build: `ZBUFF_*()` is no longer built by default (#2583, @senhuang42)
build: Fixed Meson build (#2548, @SupervisedThinking @kloczek)
build: Fix excessive compiler warnings with clang-cl and CMake (#2600, \ 
@nickhutchinson)
build: Detect presence of `md5` on Darwin (#2609, @felixhandte)
build: Avoid SIGBUS on armv6 (#2633, @bmwiedmann)
cli: `--progress` flag added to always display progress bar (#2595, @senhuang42)
cli: Allow reading from block devices with `--force` (#2613, @felixhandte)
cli: Fix CLI filesize display bug (#2550, @Cyan4973)
cli: Fix windows CLI `--filelist` end-of-line bug (#2620, @Cyan4973)
contrib: Various fixes for linux kernel patch (#2539, @terrelln)
contrib: Seekable format - Decompression hanging edge case fix (#2516, @senhuang42)
contrib: Seekable format - New seek table-only API  (#2113 #2518, @mdittmer \ 
@Cyan4973)
contrib: Seekable format - Fix seek table descriptor check when loading (#2534, \ 
@foxeng)
contrib: Seekable format - Decompression fix for large offsets, (#2594, @azat)
misc: Automatically published release tarballs available on Github (#2535, \ 
@felixhandte)