protected static String
unknownToString(byte [] data) {
	StringBuffer sb = new StringBuffer();
	sb.append("\\# ");
	sb.append(data.length);
	sb.append(" ");
	sb.append(base16.toString(data));
	return sb.toString();
}
Converts a byte array into the unknown RR format.
src/main/java/core/org/xbill/DNS/Record.java