Description:
------------
The memcached extension reads ini values wrongly resulting in 
all values defaulting to 0 leading to session lifetimes being 
infinite.

sess_lifetime = 
zend_ini_long(ZEND_STRL("session.gc_maxlifetime"), 0);

ZEND_STRL() makro is used even though zend_ini_long() seems 
to want the length of the string including the trailing \0.

Inconsistent APIs for the win.


Reproduce code:
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ini_set('session.save_handler', 'memcached');