Description:
------------
Testing a new application with memcache for caching, we had issues with 
persistent connections not being persistent. We'd never experienced issues with 
this before while using memcache extension, but after switching to memcached, we 
ran into this issue. After some discussions on IRC (with amongst others Liz 
Smith), we decided to test the latest memcached from Github 
(https://github.com/php-memcached-dev/php-memcached). Using the test script, we 
still see huge amounts (>2000) connections to memcache when running ab scripts to 
test big amounts of requests to the script, where we'd only expect a few 
connections (and we can confirm that there are only a few when using memcache 
extension).

Test script:
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<?php
$cache = new Memcached('persistent');
$cache->addServer('localhost', 11211);


Expected result:
----------------
1 or a couple of open connections to memcache

Actual result:
--------------
>2000 open connections to memcache