PHP extension for interfacing with Redis

This extension provides an API for communicating with Redis servers.

This release contains important bugfixes and improvements.

phpredis 5.1.0RC2

* Fix missing null byte in PHP_MINFO_FUNCTION [8bc2240c] (Remi Collet)
* Remove dead code generic_unsubscribe_cmd [8ee4abbc] (Pavlo Yatsukhnenko)
* Add documentation for zpopmin and zpopmax [99ec24b3, 4ab1f940] (@alexander-schranz)

phpredis 5.1.0RC1

* Fix regression for multihost_distribute_call added in 112c77e3 [fbe0f804] (Pavlo Yatsukhnenko)
* Fix regression for conntecting to unix sockets with relative path added in 1f41da64 [17b139d8, 7ef17ce1] (Pavlo Yatsukhnenko)
* Fix unix-socket detection logic broken in 418428fa [a080b73f] (Pavlo Yatsukhnenko)
* Fix memory leak and bug with getLastError for redis_mbulk_reply_assoc and redis_mbulk_reply_zipped. [7f42d628, 3a622a07] (Pavlo Yatsukhnenko), (Michael Grunder)
* Fix bug with password contain "#" for redis_session [2bb08680] (Pavlo Yatsukhnenko)
* Add optional support for Zstd compression, using --enable-redis-ztsd. This requires libzstd version >= 1.3.0 [2abc61da] (Remi Collet)
* Fix overallocation in RedisCluster directed node commands [cf93649] (Michael Grunder)
* Also attach slaves when caching cluster slots [0d6d3fdd, b114fc26] (Michael Grunder)
* Use zend_register_persistent_resource_ex for connection pooling [fdada7ae, 7c6c43a6] (Pavlo Yatsukhnenko)
* Refactor redis_session [91a8e734, 978c3074] (Pavlo Yatsukhnenko)
* Documentation improvements (@Steveb-p, @tangix, @ljack-adista, @jdreesen, Michael Grunder)