+ '$worker' => array('worker', t("Enable 'worker' background processing"), get_config('system','worker'), t("The worker background processing limits the number of parallel background jobs to a maximum number and respects the system load.")),
+ '$worker_queues' => array('worker_queues', t("Maximum number of parallel workers"), get_config('system','worker_queues'), t("On shared hosters set this to 2. On larger systems, values of 10 are great. Default value is 4.")),
+ '$worker_dont_fork' => array('worker_dont_fork', t("Don't use 'proc_open' with the worker"), get_config('system','worker_dont_fork'), t("Enable this if your system doesn't allow the use of 'proc_open'. This can happen on shared hosters. If this is enabled you should increase the frequency of poller calls in your crontab.")),
+