fix(rustproxy-http): correct HTTP/3 host extraction and avoid protocol filtering during UDP route lookup

rust/crates/rustproxy-http/src/h3_service.rs

@@ -143,10 +143,11 @@ async fn handle_h3_request(
     let uri = request.uri().clone();
     let path = uri.path().to_string();
 
-    // Extract host from :authority or Host header
-    let host = request.uri().authority()
-        .map(|a| a.as_str().to_string())
-        .or_else(|| request.headers().get("host").and_then(|v| v.to_str().ok()).map(|s| s.to_string()))
+    // Extract host from :authority or Host header (strip port to match TCP/HTTP path)
+    let host = request.uri().host()
+        .map(|h| h.to_string())
+        .or_else(|| request.headers().get("host").and_then(|v| v.to_str().ok())
+            .map(|h| h.split(':').next().unwrap_or(h).to_string()))
         .unwrap_or_default();
 
     debug!("HTTP/3 {} {} (host: {}, client: {})", method, path, host, client_ip);
@@ -160,7 +161,8 @@ async fn handle_h3_request(
         tls_version: Some("TLSv1.3"),
         headers: None,
         is_tls: true,
-        protocol: Some("http"),
+        protocol: None,  // Don't filter on protocol — transport: Udp already excludes TCP routes,
+                         // and the route was already protocol-validated at the QUIC accept level.
         transport: Some(TransportProtocol::Udp),
     };