MDL-24684 backup - basic protection against time/memory limits

backup/controller/restore_controller.class.php

@@ -296,6 +296,9 @@ class restore_controller extends backup implements loggable {
     }
 
     public function execute_plan() {
+        // Basic/initial prevention against time/memory limits
+        set_time_limit(1 * 60 * 60); // 1 hour for 1 course initially granted
+        raise_memory_limit(MEMORY_EXTRA);
         return $this->plan->execute();
     }