[whatwg] ContextAgnosticXmlHttpRequest: an informal RFC

[Doron Rosenberg]

First, no one works at Netscape anymore ;)

The reason to use an XML file is that the service provider doesn't
have to mess with his existing service to send a new header.  It is
easier to deploy using the XML file, he just has to put down an XML
file on the server.

And it makes sense to allow the provider to limit who can access him.