This is bugfix release, mostly focused on cleaning several detrimental corner cases scenarios. It is nonetheless a recommended upgrade.

Changes Summary

• perf: improved zstd_opt strategy (levels 16-19)
• fix : bug #944 : multithreading with shared ditionary and large data, reported by @gsliepen
• cli : change : -o can be combined with multiple inputs, by @terrelln
• cli : fix : content size written in header by default
• cli : fix : improved LZ4 format support, by @felixhandte
• cli : new : hidden command -b -S, to benchmark multiple files and generate one result per file
• api : change : when setting pledgedSrcSize, use ZSTD_CONTENTSIZE_UNKNOWN macro value to mean "unknown"
• api : fix : support large skippable frames, by @terrelln
• api : fix : re-using context could result in suboptimal block size in some corner case scenarios
• api : fix : streaming interface was adding a useless 3-bytes null block to small frames
• build: fix : compilation under rhel6 and centos6, reported by @pixelb
• build: added check target
• build: improved meson support, by @shawnl