A fast GFW list parser and matcher.
```bash
cargo add gfwlist
```
```rust
use gfwlist::GfwList;
let list_content = "\
";
let gfw = GfwList::from(list_content).unwrap();
assert_eq!(gfw.test("http://blocked-site.com/page").unwrap(), Some("||blocked-site.com"));
assert_eq!(gfw.test("http://exception.com/page").unwrap(), None);
assert_eq!(gfw.test("http://allowed-site.com/page").unwrap(), None);
```