Function canonicalize_using_scheme 

pub fn canonicalize_using_scheme<'a>(
    scheme: &str,
    path: &'a str,
) -> Option<String>

Make a path that is relative to the root of a scheme into a full path, following the rules of canonicalize_using_cwd.

Returns the Some if a valid path can be constructed, None if the scheme name is not valid or some other error occurs