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

[Nico Williams]

On Thu, Nov 29, 2018 at 10:00:02AM +0800, Weijun Wang wrote:
> > - If you can get Legal approval for including / distributing a fork of
> >   Martin Rex's bridge, you'll get all of the above functionality and
> >   also acceptor functionality.
> 
> Anyway, one can use his bridge with -Dsun.security.jgss.lib.

Oh, speaking of this, we wanted to be able to use the registry for this
so our users don't have to specify the -Dsun.security.jgss.lib on the
command-line.  The JDK does have a generic interface to the registry,
the Preferences interface and its implementations, but because some
implementations have support for remote stores, it depends on all of
security/ being built first, which means I couldn't use it :/

There are places where there is native C/C++ code to use the registry
because of this, and I thought of copying that pattern.  But I never got
around to doing that.

It'd be nice if Preferences, or a cut-down version for private in-JDK
use, supported access to local prefs from security components of the
JDK.  I'm not entirely sure how to make that happen, but it would be a
good project for someone, I'm sure :)

Nico
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