RFR 8031111: fix krb5 caddr (and 8079821: MSOID2.java test is not perfect)

[Weijun Wang]

Hi Valerie

Please review the code change at

    http://cr.openjdk.java.net/~weijun/8031111/webrev.00/

The codes to read local addresses are updated. We are also supporting 
the extra_addresses krb5.conf setting.

This code change triggers a bug (MSOID2.java) in a test I've recently 
added, please also review the change at

    http://cr.openjdk.java.net/~weijun/8079821/webrev.00/

Thanks
Max