[SPEC-CHANGE] Mandatory scheme in request and link URLs

[Waweic]

> What would
> => .                                    relative URI Reference - no
> host, relative path
> do? Reload the current page?

If I am not mistaken, it should load the current directory.

So if you are currently at ```gemini://example.net/a/b/c.gmi```

It would read ```gemini://example.net/a/b/.``` which would be
normalized as ```gemini://example.net/a/b/```

In theory, it should be possible to have an empty path as a URI
Reference, or an empty path with a query and / or a fragment. I don't
think it's possible to have this situation in Gemini.