Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/lib/environment/exception/addon.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * The exception thrown when value doesn't pass validation.
+ *
+ * @author     Time.ly Network Inc.
+ * @since      2.2
+ *
+ * @package    AI1EC
+ * @subpackage AI1EC.Lib
+ */
+class Ai1ec_Outdated_Addon_Exception extends Ai1ec_Exception {
+
+    protected $_addon;
+
+    /**
+     * Constructor.
+     *
+     * @param string $message Exception message.
+     * @param string $addon   Addon to disable.
+     *
+     * @return void Method does not return.
+     */
+    public function __construct( $message, $addon ) {
+        parent::__construct( $message );
+        $this->_addon = $addon;
+    }
+
+    /**
+     * Returns addon name.
+     *
+     * @return string Addon name.
+     */
+    public function plugin_to_disable() {
+        return $this->_addon;
+    }
+
+    /**
+     * Overrides __toString() to avoid stack trace.
+     *
+     * @return string Empty string.
+     */
+    public function __toString() {
+        return '';
+    }
+
+    /**
+     * @see Ai1ec_Exception::get_redirect_url()
+     */
+    public function get_redirect_url() {
+        return ai1ec_admin_url( 'plugins.php' );
+    }
+
+    /**
+     * @see Ai1ec_Exception::display_backtrace()
+     */
+    public function display_backtrace(){
+        return false;
+    }
+}