nit: use Uri#toRelativeUrl

Author: slandelle

client/src/main/java/org/asynchttpclient/netty/request/NettyRequestFactory.java

@@ -233,8 +233,7 @@ private String requestUri(Uri uri, ProxyServer proxyServer, boolean connect) {
 
     } else {
       // direct connection to target host or tunnel already connected: only path and query
-      String path = getNonEmptyPath(uri);
-      return isNonEmpty(uri.getQuery()) ? path + "?" + uri.getQuery() : path;
+      return uri.toRelativeUrl();
     }
   }