start_save_thread (Raggle::Engine)

    # File raggle, line 5529
        def Engine::start_save_thread
          ret = Thread.new do
            first_iteration = true
            interval = $config['save_sleep_interval'] || 300
            loop do
              unless first_iteration
                Raggle::Engine::save_config(quit=false)
                $new_status = $config['msg_save_done'] unless $config['msg_save_done'].empty?
              end
              first_iteration = false
              sleep interval
            end
          end

          # return thread
          ret
        end