I put back a critical bug fix:

Fixed 6578538: com.sun.crypto.provider.SunJCE instance leak using KRB5 and LoginContext

The build processes for JCE (sunjce_provider.jar) in OpenJDK6 haven't been established yet. Once we have that established, I'll putback the binary provider file in the closed directory. Since we're not really building using the make/closed area, the only test that will fail is the TestProviderLeak.java.