Code review request: 8011867 and 8011745, pkcs data types

[Weijun Wang]

8011745: Unknown CertificateChoices

   http://cr.openjdk.java.net/~weijun/8011745/webrev.00/

8011867: Accept unknown PKCS #9 attributes

   http://cr.openjdk.java.net/~weijun/8011867/webrev.00/

Thanks
Max