find_closest_of_type
nskey = find_closest_of_type(env, qname, qnamelen, qclass, now,
(rrset=find_closest_of_type(env, qname, qnamelen, qclass, now,
nskey = find_closest_of_type(env, qname, qnamelen, qclass, now,
(rrset=find_closest_of_type(env, qname, qnamelen, qclass, now,