attempt to fix scp style VCS url parsing
Created by: arussellsaw
This PR adds a new vcs.URL wrapper type to fix issues with URL parsing introducing incorrect absolute paths, eg: [email protected]:foo/bar.git becomes ssh://[email protected]/foo/bar.git. On GitHub & GitLab this is fine, as they do non-standard things with their git to make this work, but standard git implementations treat those two urls differently, one being relative path and the other absolute from /.
This fix adds a wrapper vcs.URL with an overridden String() function, which will fall back to stdlib if a scheme is specified, but for URLs without a scheme uses a method that returns the original path unmutated.