Support for PROPFIND with empty request body

[acamargo]

As http://www.ics.uci.edu/~ejw/authoring/protocol/rfc2518.html#METHOD_PROPFIND suggests: "An empty PROPFIND request body MUST be treated as a request for the names and values of all properties."

I saw that Microsoft's Mini-Redirector used to request PROPFIND with empty request body and after applied this patch it worked fine.

I guess we should have some test for that, how can we make it?