docs: public static InetAddress getInetAddress( String key, InetAddress def ) {
          String addr = prp.getProperty( key );
          if( addr != null ) {
              try {
                  def = InetAddress.getByName( addr );
              } catch( UnknownHostException uhe ) {
                  if( log.level > 0 ) {
                      log.println( addr );
                      uhe.printStackTrace( log );
                  }
              }
          }
          return def;
      }