rrclass_to_string
const char *rrclass_to_string(uint16_t rrclass);
rrclass_to_string(rr->klass), rrtype_to_string(rr->type));
prefix, rrclass_to_string(i), (unsigned long)st->qclass[i]);
rrclass_to_string(i), (unsigned long)st->qclass[i]))
rrclass_to_string(record->klass),
printf("\t%s", rrclass_to_string(rr->klass));