v3.1.0.19

Added

• nuster.cache.hit sample fetch
• disk support in stats
• purge persistence files
• Merge HAProxy v1.9.11

Changed

• Save host and path in persist file

Fixed

• Close fd and remove invalid cache files
• fd is not closed in creating disk cache file
• Fix incorrect key allocation
• Fix segfault when tune.bufsize is not 16k