code: String
  rrToString() {
  	StringBuffer sb = new StringBuffer();
  	sb.append(hashAlg);
  	sb.append(' ');
  	sb.append(flags);
  	sb.append(' ');
  	sb.append(iterations);
  	sb.append(' ');
  	if (salt == null)
  		sb.append('-');
  	else
  		sb.append(base16.toString(salt));
  
  	return sb.toString();
  }
docs: Converts rdata to a String