Keep exitwhennothingtodo as optional config

Author: dereuromark

config/app_queue.php

@@ -24,14 +24,14 @@
 		// seconds of running time after which the worker will terminate (0 = unlimited)
 		'workermaxruntime' => 120,
 
-		// instruct a Workerprocess quit when there are no more tasks for it to execute (true = exit, false = keep running)
-		'exitwhennothingtodo' => false,
-
 		// minimum time (in seconds) which a task remains in the database before being cleaned up.
 		'cleanuptimeout' => 2592000, // 30 days
 
 		/* Optional config keys */
 
+		// instruct a Workerprocess quit when there are no more tasks for it to execute (true = exit, false = keep running)
+		'exitwhennothingtodo' => false,
+
 		// seconds of running time after which the PHP process will terminate, null uses workermaxruntime * 100
 		'workertimeout' => null,
 

src/Shell/QueueShell.php

@@ -200,7 +200,7 @@ public function runworker() {
 					$this->_log('job ' . $queuedJob->job_type . ', id ' . $queuedJob->id . ' failed and ' . $failedStatus, $pid);
 					$this->out('Job did not finish, ' . $failedStatus . ' after try ' . $queuedJob->failed . '.');
 				}
-			} elseif (Configure::readOrFail('Queue.exitwhennothingtodo')) {
+			} elseif (Configure::read('Queue.exitwhennothingtodo')) {
 				$this->out('nothing to do, exiting.');
 				$this->_exit = true;
 			} else {