[XML-SIG] Dropping xml.marshal

[Martin v. Loewis]

> The code in the xml.marshal package is out of date, and I've never
> heard of anyone using it.  Therefore, I suggest it be deleted.  
> Any objections?

Yes. There have been user contributions to the wddx code, so
apparently some users do care atleast about wddx. I'm not so sure that
the other two marshallers have any value, but atleast the generic one
needs to stay to support wddx. So if you want to remove xml-rpc, go
ahead.

Regards,
Martin