update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/Monolog/Handler/FileHandler.php

@@ -0,0 +1,31 @@
+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+
+namespace Piwik\Plugins\Monolog\Handler;
+
+use Monolog\Handler\StreamHandler;
+use Piwik\Filechecks;
+
+/**
+ * Writes log to file.
+ *
+ * Extends StreamHandler to be able to have a custom exception message.
+ */
+class FileHandler extends StreamHandler
+{
+    protected function write(array $record)
+    {
+        try {
+            parent::write($record);
+        } catch (\UnexpectedValueException $e) {
+            throw new \Exception(
+                Filechecks::getErrorMessageMissingPermissions($this->url)
+            );
+        }
+    }
+}