core: fix presets in relay.js

src/core/relay.js

@@ -78,7 +78,7 @@ export class Relay extends EventEmitter {
     this._bsocket.setTimeout(__TIMEOUT__);
     let presets = __PRESETS__;
     // prepend "proxy" preset to the top of presets on client side
-    if (__IS_CLIENT__ && presets[0].name !== 'proxy') {
+    if (__IS_CLIENT__ && !['proxy', 'tunnel'].includes(presets[0].name)) {
       presets = [{name: 'proxy'}].concat(presets);
     }
     // add "tracker" preset to the preset list on both sides