Darcs could be a bit more intelligent with how it interprets colons
in repository URLs. In particular, we should follow the example of
git and search for the ":" to signal that this is an ssh URL only up
to the first "/".
That is, the following should succeed and create a local repo named
> darcs clone ./screened ./screened:clone
Currently this gives me:
ssh: Could not resolve hostname ./screened: Name or service not
Refusing to overwrite existing file or directory.