[whatwg/url] empty username? (#139)

```
http://:pass@domain/
```
throws an error. These work fine, however:
```
http://user:@domain/
http://user@domain/
http://@domain/
```

---
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/url/issues/139