Bug#906770: README.Debian could use some clarificatons

[Moritz Mühlenhoff]

On Mon, Dec 10, 2018 at 02:48:17PM +0100, Emmanuel Bourg wrote:
> I think it supports both. Upstream has the following README file in this
> directory (I'll add it in the next update) :

Thanks!

Cheers,
        Moritz