New (be)req fields: path scheme and authority

[Dridi Boukelmoune]

> The proposal is to have new request fields:
> - req.path (the absolute path)
> - req.host (the virtual host)
> - req.authority

Guillaume pointed out that as we say in French I tangled my brushes up.

What I meant was:
- req.path (the absolute path)
- req.scheme (http or https)
- req.authority (the virtual host)

Sorry about that, I was writing the previous message in a hurry and I
missed it when I reviewed it before pressing the send button.

All the best,
Dridi