Log Message:
php-redis3: update to 3.1.6

Update php-redis3 from release 3.1.3 to release 3.1.6.

* Changes between 3.1.3 and 3.1.4:

    The primary new feature phpredis 3.1.4 is the ability to send MULTI .. EXEC \ 
blocks in pipeline mode.  There are
    also many bugfixes and minor improvements to the api, listed below:

    * Allow mixing MULTI and PIPELINE modes (experimental)!  [5874b0] (Pavlo \ 
Yatsukhnenko)

    * Added integration for coverty static analysis and fixed several warnings
      [faac8b0, eff7398, 4766c25, 0438ab4, 1e0b065, 733732a, 26eeda5, 735025, \ 
42f1c9, af71d4] (Pavlo Yatsukhnenko)
    * Fixed link to redis cluster documentation [3b0b06] (Pavlo Yatsukhnenko)
    * Remove unused PHP_RINIT and PHP_RSHUTDOWN functions [c760bf] (Pavlo \ 
Yatsukhnenko)
    * Removed duplicate HGET in redis array hash table, formatting [d0b9c5] \ 
(Pavlo Yatsukhnenko)
    * Treat NULL bulk as success for session read [659450] (Pavlo Yatsukhnenko)
    * Refactor redis_send_discard [ea15ce] (Pavlo Yatsukhnenko)
    * Updated runtime exception handling [8dcaa4, 7c1407] (Pavlo Yatsukhnenko)
    * Added a github issue template [61aba9] (Pavlo Yatsukhnenko)
    * Initialize gc member of zend_string [37f569) (Pavlo Yatsukhnenko)
    * Fix valgrind warnings [471ce07, 1ab89e1, b624a8b] (Pavlo Yatsukhnenko)
    * Fix php5/php7 compatibility layer [1ab89e, 4e3225] (Pavlo Yatsukhnenko)
    * Fix typo in README.markdown [e47e44] (Mark Shehata)
    * Improve redis array rehash [577a91] (Pavlo Yatsukhnenko)
    * Change redis array pure_cmds from zval to hashtable [a56ed7] (Pavlo \ 
Yatsukhnenko)
    * Don't try to set TCP_NODELAY on a unix socket and don't warn on multiple
      calls to pipeline [d11798, 77aeba] (Michael Grunder)
    * Use zend_string rather than char* for various context fields (err, prefix, \ 
etc) [2bf7b2] (Pavlo Yatsukhnenko)
    * Various other library fixes [142b51, 4452f6, e672f4, 658ee3, c9df77, \ 
4a0a46] (Pavlo Yatsukhnenko)

* Changes between 3.1.4 and 3.1.5:

    This is interim release which contains only bug fixes.

    * Fix segfault when extending Redis class in PHP 5 [d23eff] (Pavlo Yatsukhnenko)
    * Fix RedisCluster constructor with PHP 7 strict scalar type [5c21d7] (Pavlo \ 
Yatsukhnenko)
    * Allow to use empty string as persistant_id [344de5] (Pavlo Yatsukhnenko)
    * Fix cluster_init_seeds. [db1347] (@adlagares)
    * Fix z_seeds may be a reference [42581a] (@janic716)
    * PHP >=7.3 uses zend_string for php_url elements [b566fb] (@fmk)

* Changes between 3.1.5 and 3.1.6:

    This release conains only fix of RedisArray distributor hashing function
    which was broken in 3.1.4. Huge thanks to @rexchen123