Record
getObject() {
	return new NSECRecord();
}
Next SECure name - this record contains the following name in an
ordered list of names in the zone, and a set of types for which
records exist for this name.  The presence of this record in a response
signifies a negative response from a DNSSEC-signed zone.

This replaces the NXT record.

@author Brian Wellington
@author David Blacka
src/main/java/core/org/xbill/DNS/NSECRecord.java