code: String
  rrToString() {
  	StringBuffer sb = new StringBuffer();
  	sb.append(order);
  	sb.append(" ");
  	sb.append(preference);
  	sb.append(" ");
  	sb.append(byteArrayToString(flags, true));
  	sb.append(" ");
  	sb.append(byteArrayToString(service, true));
  	sb.append(" ");
  	sb.append(byteArrayToString(regexp, true));
  	sb.append(" ");
  	sb.append(replacement);
  	return sb.toString();
  }
docs: Converts rdata to a String