docs: private List<File> getConfigFiles() {
  
          String[] filenames = {
              "opencms-modules.xml",
              "opencms-system.xml",
              "opencms-vfs.xml",
              "opencms-importexport.xml",
              "opencms-sites.xml",
              "opencms-variables.xml",
              "opencms-scheduler.xml",
              "opencms-workplace.xml",
              "opencms-search.xml"};
          List<File> result = new ArrayList<>();
          for (String fn : filenames) {
              File file = new File(m_configDir, fn);
              if (file.exists()) {
                  result.add(file);
              }
          }
          return result;
      }