[Games] Add Hell Let Loose support.

src/games/hll.rs

@@ -0,0 +1,17 @@
+use std::net::IpAddr;
+use crate::{
+    protocols::valve::{self, game, SteamApp},
+    GDResult,
+};
+
+pub fn query(address: &IpAddr, port: Option<u16>) -> GDResult<game::Response> {
+    let valve_response = valve::query(
+        address,
+        port.unwrap_or(26420),
+        SteamApp::HLL.as_engine(),
+        None,
+        None,
+    )?;
+
+    Ok(game::Response::new_from_valve_response(valve_response))
+}

src/games/mod.rs

@@ -100,3 +100,5 @@ pub mod quake2;
 pub mod quake1;
 /// Quake 3: Arena
 pub mod quake3a;
+/// Hell Let Loose
+pub mod hll;