Fix ssh url -> local directory mapping (#22)

This is the fix for
EmbarkStudios/cargo-deny#548 as the hash was
correct since it takes the entirety of the user provided url into
account, but it wasn't stripping off the user portion of the url causing
it to look at the wrong local directory.

src/utils.rs

@@ -185,6 +185,7 @@ pub fn url_to_local_dir(url: &str) -> Result<UrlDir, Error> {
 
         // trim port
         let host = host.split(':').next().unwrap();
+        let host = host.split_once('@').map_or(host, |(_user, host)| host);
 
         (format!("{host}-{ident}"), url.to_owned())
     };
@@ -305,6 +306,17 @@ mod test {
 
         assert_eq!("https://gitlab.com/gilrs-project/gilrs", canonical);
         assert_eq!("gilrs-7804d1d6a17891c9", dir_name);
+
+        let super::UrlDir {
+            dir_name,
+            canonical,
+        } = url_to_local_dir("ssh://git@github.com/rust-lang/crates.io-index.git").unwrap();
+
+        assert_eq!(
+            "ssh://git@github.com/rust-lang/crates.io-index.git",
+            canonical
+        );
+        assert_eq!("github.com-01dba724c7458575", dir_name);
     }
 
     #[test]