[Distutils] Proposed patch: allowing unknown keywords

[Tim Peters]

[A.M. Kuchling]
> I'd like to check in the following patch; it causes unknown keywords
> in the setup() invocation to trigger a warning instead of an
> exception.  This will make it possible to add more metadata arguments
> to setup() in future versions while still letting packages be
> installed with Distutils versions lacking the added arguments.

+1.  Fine idea!  The only caution is that a package may *need* those "future
options" to install correctly -- but then that's up to the package's authoer
to keep straight.

> Any objections?  Should it be backported to Python 2.2?

I think so -- looks like the 2.2 line will be around for a long time.