* standalone path parsing?
* Test setters
  * Test trim C0/space
  * Test remove tab & newline



#[test]
fn test_path_segments() {
    let mut url = Url::parse("http://example.net").unwrap();
    url.push_path_segment("foo").unwrap();
    url.extend_path_segments(&["bar", "b/az"]).unwrap();
    assert_eq!(url.as_str(), "http://example.net/foo");
}