pub fn classify(url: &str) -> Result<Wire, String>Expand description
What transport url names, or a refusal that says what gunnar can dial.
The scp-like form is recognised the way git recognises it: a : before any
/, with no scheme. A URL that is neither is refused rather than guessed
at — a mirror registered against a path on the local disk would otherwise
look like it was configured and then fail on the first sync with a
connection error.