This reverts commit 05a9903c.

Issue #2848252 by lhridley, Jeremy: drush clear-cache results in:  array_merge(): Argument #2 is not an array dmemcache.inc:404

Jeremy Andrews authored Jan 24, 2017 and Jeremy Andrews committed Jan 24, 2017

Issue #1977452 by markpavlitski, Jeremy: Add persistent connection support for the PECL Memcached extension

Sascha Grossenbacher authored Jan 19, 2017 and Jeremy Andrews committed Jan 19, 2017

Issue #1896452 by markpavlitski, Berdir, codycraven, Jeremy: Active memcache more than doubles cache clear/menu rebuild time

Eduardo Alvarez authored Jan 19, 2017 and Jeremy Andrews committed Jan 19, 2017

Issue #2415109 by Eduardo Alvarez, Jeremy: Notice: unserialize(): Error at offset in _dmemcache_get_pieces()

Issue #1993170 by erikwebb, linvald, Jeremy: add Drush commands to flush cache and display statistics

Demin Yin authored Jan 15, 2017 and Jeremy Andrews committed Jan 15, 2017

Issue #2733947 by deminy, Jeremy: Add compatibility with PHP 7 for method call \Memcached::getMulti()

Issue #467226 by litwol, markpavlitski, bmhaskar, thedavidmeister, fago, CurtisTAG, catch, Jeremy: Support for per-bin key prefix