Memcached provides a custom session handler that can be used to store
user sessions in memcache. A completely separate memcached instance is used
for that internally, so you can use a different server pool if necessary. The
session keys are stored under the prefix
memc.sess.key., so be aware of this if you use the
same server pool for sessions and generic caching.
session.save_handler
string
Set to memcached to enable sessions support.
session.save_path
string
Defines a comma separated of hostname:port entries to
use for session server pool, for example
"sess1:11211, sess2:11211".