add piwik installation

www/analytics/core/Updates/1.1.php

@@ -0,0 +1,44 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+
+namespace Piwik\Updates;
+
+use Piwik\Config;
+use Piwik\Piwik;
+use Piwik\Updates;
+
+/**
+ */
+class Updates_1_1 extends Updates
+{
+    static function update()
+    {
+        $config = Config::getInstance();
+
+        try {
+            $superuser = $config->superuser;
+        } catch (\Exception $e) {
+            return;
+        }
+
+        if (empty($superuser['login'])) {
+            return;
+        }
+
+        $rootLogin = $superuser['login'];
+        try {
+            // throws an exception if invalid
+            Piwik::checkValidLoginString($rootLogin);
+        } catch (\Exception $e) {
+            throw new \Exception('Superuser login name "' . $rootLogin . '" is no longer a valid format. '
+                . $e->getMessage()
+                . ' Edit your config/config.ini.php to change it.');
+        }
+    }
+}