nuster HAProxy performance is based on a cache server and the HTTP cache server RESTful NoSQL, Varnish or the like may be used as Nginx HTTP cache server to cache HTTP static or dynamic resources, it may also be used RESTful NoSQL cache server, with HTTP POST / GET / dELETE to add / get / delete Key / Value.
### 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