RFR 6722928: Support SSPI as a native GSS-API provider

[Nico Williams]

On Tue, Nov 20, 2018 at 09:56:36AM +0800, Weijun Wang wrote:
> Please take a review at
> 
>    https://cr.openjdk.java.net/~weijun/6722928/webrev.01/
> 
> We ported [1] the native GSS bridge to Windows in JDK 11, but user still have
> to download and install a native GSS-API library. This code change provides a
> native GSS-API library inside JDK that can be used without setting the
> "sun.security.jgss.lib" system property. It is based on Windows SSPI and now
> only supports the client side using the default credentials.
> 
> No regression tests included. A Windows Active Directory server is needed.

I'll review soon.

Nico
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