[7u6] Request for approval: 7176784: Windows authentication not working on some computers

[Chris Hegarty]

Requesting approval to push CR 7176784 to 7u6.
Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7176784
Webrev: http://cr.openjdk.java.net/~chegar/7176784/webrev.00/webrev/

This fix has been pushed into jdk8 [1], and it ultra conservative.

Thanks,
-Chris.

[1] http://hg.openjdk.java.net/jdk8/tl/jdk/rev/4a4a04bfeece