[XML-SIG] empty namespaces

[Lars Marius Garshol]

* Alexandre Fayolle
| 
| Would adding an "EMPTY_NAMESPACE = None" to xml/dom/__init__.py,
| just after the definitions of XML_NAMESPACE and XMLNS_NAMESPACE be
| considered to be a good idea?

I don't think so. We're not going to change this, so I don't really
see what we achieve by it.

--Lars M.