增加防抓包hook，登录mqtt，退出登录时不传token

QXLive/Network/QXRequest.m

@@ -261,6 +261,8 @@ static NSInteger HTTP_ERROR_CODE = 0;
     [manager.requestSerializer setValue:appVersion forHTTPHeaderField:@"App-Version"];
     if ([QXGlobal shareGlobal].isLogin) {
         [manager.requestSerializer setValue:[QXGlobal shareGlobal].loginModel.token forHTTPHeaderField:@"token"];
+    }else{
+        [manager.requestSerializer setValue:@"" forHTTPHeaderField:@"token"];
     }
     switch (type) {
         case GET: {