void rrToWire(DNSOutput out, Compression c, boolean canonical) {
out.writeU8(hashAlg);
out.writeU8(flags);
out.writeU16(iterations);
if (salt != null) {
out.writeU8(salt.length);
out.writeByteArray(salt);
} else out.writeU8(0);
out.writeU8(next.length);
out.writeByteArray(next);
types.toWire(out);
}
