v1.15.6

What's Changed

• s2: Improve coding for long, close matches by @klauspost in #613
• s2c: Add Snappy/S2 stream recompression by @klauspost in #611
• zstd: Use configured block size by @klauspost in #605
• zstd: Fix incorrect hash table placement for dict encoding in default by @klauspost in #606
• zstd: Apply default config to ZipDecompressor without options by @klauspost in #608
• gzhttp: Exclude more common archive formats by @klauspost in #612
• s2: Add ReaderIgnoreCRC by @klauspost in #609
• s2: Remove sanity load on index creation by @klauspost in #607
• snappy: Use dedicated function for scoring by @klauspost in #614
• s2c+s2d: Use official snappy framed extension by @klauspost in #610

Full Changelog: v1.15.5...v1.15.6