docs: public synchronized void shutdown() {
          this.shutdownManagementWatchdogs();
  
          // deactivate all Watchdogs ....
          Iterator iter = registeredWachdogs.values().iterator();
          while (iter.hasNext()) {
              IWatchdog th = (IWatchdog) iter.next();
              th.deactivate();
              if (log.isInfoEnabled()) {
                  log.info(". . . Deactivating Watchdog " + th.getId());
              }
          }
  
          this.kill();
  
      }