public void
apply(Message m, int error, TSIGRecord old) {
	Record r = generate(m, m.toWire(), error, old);
	m.addRecord(r, Section.ADDITIONAL);
	m.tsigState = Message.TSIG_SIGNED;
}
Generates a TSIG record with a specific error for a message and adds it
to the message.
@param m The message
@param error The error
@param old If this message is a response, the TSIG from the request
src/main/java/core/org/xbill/DNS/TSIG.java