fixed typo

docs/guide/intro-upgrade-from-v1.md

@@ -209,7 +209,7 @@ To learn more details about models, please refer to the [Models](structure-model
 Controllers
 -----------
 
-Yii 2.0 uses [[yii\web\Controller]] as the base controller class, similar to `CWebController` in Yii 1.1.
+Yii 2.0 uses [[yii\web\Controller]] as the base controller class, which is similar to `CController` in Yii 1.1.
 [[yii\base\Action]] is the base class for action classes.
 
 The most obvious impact of these changes on your code is that a controller action should return the content

extensions/elasticsearch/Connection.php

@@ -319,7 +319,7 @@ class Connection extends Component
         $body = '';
 
         $options = [
-            CURLOPT_USERAGENT      => 'Yii Framework 2 ' . __CLASS__,
+            CURLOPT_USERAGENT      => 'Yii Framework ' . Yii::getVersion() . __CLASS__,
             CURLOPT_RETURNTRANSFER => false,
             CURLOPT_HEADER         => false,
             // http://www.php.net/manual/en/function.curl-setopt.php#82418