RFR 8044500: Add kinit options and krb5.conf flags that allow users to obtain renewable tickets and specify ticket lifetimes

[Wang Weijun]

Hi All

Please review the code change at

  http://cr.openjdk.java.net/~weijun/8044500/webrev.00

It adds support for ticket_lifetime and renew_lifetime in krb5.conf, and add -r 
-l -R to kinit (on Windows).

Thanks
Max