#346: Add migration script to install 404 redirect plugin

install/mysql/migrations/v2.0.0/20180301063731_install_plg_system404.php

@@ -0,0 +1,22 @@
+<?php
+
+use Phinx\Migration\AbstractMigration;
+
+class InstallPlgSystem404 extends AbstractMigration
+{
+    public function up()
+    {
+        $sql = <<<EOL
+INSERT INTO `extensions` (`extension_id`, `name`, `type`, `element`, `folder`, `client_id`, `enabled`, `access`, `protected`, `manifest_cache`, `params`, `custom_data`, `system_data`, `checked_out`, `checked_out_time`, `ordering`, `state`)
+VALUES
+    (450, 'plg_system_404', 'plugin', '404', 'system', 0, 1, 1, 0, '{}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0);
+EOL;
+
+        $this->execute($sql);
+    }
+
+    public function down()
+    {
+        $this->execute("DELETE FROM `extensions` WHERE `extensions`.`name` = 'plg_system_404'");
+    }
+}