Parse absolute paths as local urls on Windows

The check done by Git is a bit more extensive (it checks that the first
char is a possible dos driver letter), but this change should cover the
most cases.

Author: niklaswimmer

gix-url/src/parse/mod.rs

@@ -66,8 +66,10 @@ fn find_scheme(input: &BStr) -> InputScheme {
     if let Some(colon) = input.find_byte(b':') {
         // allow user to select files containing a `:` by passing them as absolute or relative path
         // this is behavior explicitly mentioned by the scp and git manuals
-        if !&input[..colon].contains(&b'/') {
-            // TODO: implement windows specific checks
+        let explicitly_local = &input[..colon].contains(&b'/');
+        let dos_driver_letter = cfg!(windows) && input[..colon].len() == 1;
+
+        if !explicitly_local && !dos_driver_letter {
             return InputScheme::Scp { colon };
         }
     }