docs: private void initFromSPIServiceLoader() {
  
          String property = System.getProperty("druid.load.spifilter.skip");
          if (property != null) {
              return;
          }
  
          ServiceLoader<Filter> druidAutoFilterLoader = ServiceLoader.load(Filter.class);
  
          for (Filter autoFilter : druidAutoFilterLoader) {
              AutoLoad autoLoad = autoFilter.getClass().getAnnotation(AutoLoad.class);
              if (autoLoad != null && autoLoad.value()) {
                  if (LOG.isInfoEnabled()) {
                      LOG.info("load filter from spi :" + autoFilter.getClass().getName());
                  }
                  addFilter(autoFilter);
              }
          }
      }