RFR (+CSR) 8201627: Kerberos sequence number issues

[Weijun Wang]

Please take a review of this fix:

   webrev: http://cr.openjdk.java.net/~weijun/8201627/webrev.00/
   CSR: https://bugs.openjdk.java.net/browse/JDK-8201814

Basically we fix some bugs and introduce a system property so we can interop 
with everyone.

Thanks
Max