sldns_wire2str_class
char* sldns_wire2str_class(uint16_t rrclass);
cl = sldns_wire2str_class(ntohs(k->rk.rrset_class));
cl = sldns_wire2str_class(k->qclass);
char* c = sldns_wire2str_class(dclass);
char* c = sldns_wire2str_class(sub->s->s.qinfo.qclass);
char* c = sldns_wire2str_class(m->s.qinfo.qclass);
char* sldns_wire2str_class(uint16_t rrclass);