generate documentation from config.sample.php

admin_manual/configuration_server/config_sample_php_parameters.rst

@@ -1379,6 +1379,16 @@ be caused by concurrent operations. Mainly relevant for
 very large installations with many users working with
 shared files.
 
+::
+
+	'filelocking.ttl' => 3600,
+
+Set the time-to-live for locks in secconds.
+
+Any lock older than this will be automatically cleaned up.
+
+If not set this defaults to either 1 hour or the php max_execution_time, whichever is higher.
+
 ::
 
 	'memcache.locking' => '\\OC\\Memcache\\Redis',