Update to NIST RDS 2.40
Update to NIST RDS 2.40

Update of the URL to NIST RDS 2.40 and
change to the ZIP archive path (NIST added ./minimal/).

pombredanne/nsrlsvr,rjhansen/nsrlsvr,pombredanne/nsrlsvr,rjhansen/nsrlsvr,pombredanne/nsrlsvr,rjhansen/nsrlsvr