code: public static ResourceRecordSet<CNAMEData> cname(String name, String cname) {
      return new CNAMEBuilder().name(name).add(cname).build();
    }
docs: creates cname set of cname single {@link denominator.model.rdata.CNAMEData CNAME} record for
  the specified name.
  
  @param name  ex. {@code www.denominator.io.}
  @param cname ex. {@code www1.denominator.io.}