Zstd

bug: Fix Dictionary Compression Ratio Regression by cyan4973 (1709)
bug: Fix Buffer Overflow in legacy v0.3 decompression by felixhandte (1722)
build: Add support for IAR C/C++ Compiler for Arm by joseph0918 (1705)

bug: Fix bug in zstd-0.5 decoder by terrelln (1696)
bug: Fix seekable decompression in-memory API by iburinoc (1695)
misc: Validate blocks are smaller than size limit by vivekmg (1685)
misc: Restructure source files by ephiepark (1679)

bug: Fix data corruption in niche use cases by terrelln (1659)
bug: Fuzz legacy modes, fix uncovered bugs by terrelln (1593, 1594, 1595)
bug: Fix out of bounds read by terrelln (1590)
perf: Improve decode speed by ~7% mgrice (1668)
perf: Slightly improved compression ratio of level 3 and 4 (ZSTD_dfast) by cyan4973 (1681)
perf: Slightly faster compression speed when re-using a context by cyan4973 (1658)
perf: Improve compression ratio for small windowLog by cyan4973 (1624)
perf: Faster compression speed in high compression mode for repetitive data by terrelln (1635)
api: Add parameter to generate smaller dictionaries by tyler-tran (1656)
cli: Recognize symlinks when built in C99 mode by felixhandte (1640)
cli: Expose cpu load indicator for each file on -vv mode by ephiepark (1631)
cli: Restrict read permissions on destination files by chungy (1644)
cli: zstdgrep: handle -f flag by felixhandte (1618)
cli: zstdcat: follow symlinks by vejnar (1604)
doc: Remove extra size limit on compressed blocks by felixhandte (1689)
doc: Fix typo by yk-tanigawa (1633)
doc: Improve documentation on streaming buffer sizes by cyan4973 (1629)
build: CMake: support building with LZ4 leeyoung624 (1626)
build: CMake: install zstdless and zstdgrep by leeyoung624 (1647)
build: CMake: respect existing uninstall target by j301scott (1619)
build: Make: skip multithread tests when built without support by michaelforney (1620)
build: Make: Fix examples/ test target by sjnam (1603)
build: Meson: rename options out of deprecated namespace by lzutao (1665)
build: Meson: fix build by lzutao (1602)
build: Visual Studio: don't export symbols in static lib by scharan (1650)
build: Visual Studio: fix linking by absotively (1639)
build: Fix MinGW-W64 build by myzhang1029 (1600)
misc: Expand decodecorpus coverage by ephiepark (1664)

perf: Improve level 1 compression speed in most scenarios by 6% by gbtucker and terrelln
api: Move the advanced API, including all functions in the staging section, to the stable section
api: Make ZSTD_e_flush and ZSTD_e_end block for maximum forward progress
api: Rename ZSTD_CCtxParam_getParameter to ZSTD_CCtxParams_getParameter
api: Rename ZSTD_CCtxParam_setParameter to ZSTD_CCtxParams_setParameter
api: Don't export ZSTDMT functions from the shared library by default
api: Require ZSTD_MULTITHREAD to be defined to use ZSTDMT
api: Add ZSTD_decompressBound() to provide an upper bound on decompressed size by shakeelrao
api: Fix ZSTD_decompressDCtx() corner cases with a dictionary
api: Move ZSTD_getDictID_*() functions to the stable section
api: Add ZSTD_c_literalCompressionMode flag to enable or disable literal compression by terrelln
api: Allow compression parameters to be set when a dictionary is used
api: Allow setting parameters before or after ZSTD_CCtx_loadDictionary() is called
api: Fix ZSTD_estimateCStreamSize_usingCCtxParams()
api: Setting ZSTD_d_maxWindowLog to 0 means use the default
cli: Ensure that a dictionary is not used to compress itself by shakeelrao
cli: Add --[no-]compress-literals flag to enable or disable literal compression
doc: Update the examples to use the advanced API
doc: Explain how to transition from old streaming functions to the advanced API in the header
build: Improve the Windows release packages
build: Improve CMake build by hjmjohnson
build: Build fixes for FreeBSD by lwhsu
build: Remove redundant warnings by thatsafunnyname
build: Fix tests on OpenBSD by bket
build: Extend fuzzer build system to work with the new clang engine
build: CMake now creates the libzstd.so.1 symlink
build: Improve Menson build by lzutao
misc: Fix symbolic link detection on FreeBSD
misc: Use physical core count for -T0 on FreeBSD by cemeyer
misc: Fix zstd --list on truncated files by kostmo
misc: Improve logging in debug mode by felixhandte
misc: Add CirrusCI tests by lwhsu
misc: Optimize dictionary memory usage in corner cases
misc: Improve the dictionary builder on small or homogeneous data
misc: Fix spelling across the repo by jsoref

perf: better decompression speed on large files (+7%) and cold dictionaries (+15%)
perf: slightly better compression ratio at high compression modes
api : finalized advanced API, last stage before "stable" status
api : new --rsyncable mode, by terrelln
api : support decompression of empty frames into NULL (used to be an error) (1385)
build: new set of macros to build a minimal size decoder, by felixhandte
build: fix compilation on MIPS32, reported by clbr (1441)
build: fix compilation with multiple -arch flags, by ryandesign
build: highly upgraded meson build, by lzutao
build: improved buck support, by obelisk
build: fix cmake script : can create debug build, by pitrou
build: Makefile : grep works on both colored consoles and systems without color support
build: fixed zstd-pgo, by bmwiedemann
cli : support ZSTD_CLEVEL environment variable, by yijinfb (1423)
cli : --no-progress flag, preserving final summary (1371), by terrelln
cli : ensure destination file is not source file (1422)
cli : clearer error messages, especially when input file not present
doc : clarified zstd_compression_format.md, by ulikunitz
misc: fixed zstdgrep, returns 1 on failure, by lzutao
misc: NEWS renamed as CHANGELOG, in accordance with fboss

perf: slightly better decompression speed on clang (depending on hardware target)
fix : performance of dictionary compression for small input < 4 KB at levels 9 and 10
build: no longer build backtrace by default in release mode; restrict further automatic mode
build: control backtrace support through build macro BACKTRACE
misc: added man pages for zstdless and zstdgrep, by samrussell