[ticket/12008] The read_notification_last_gc config setting should be dynamic.

PHPBB3-12008

phpBB/phpbb/db/migration/data/v310/notifications_cron_p2.php

@@ -0,0 +1,27 @@
+<?php
+/**
+*
+* @package migration
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+namespace phpbb\db\migration\data\v310;
+
+class notifications_cron_p2 extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array('\phpbb\db\migration\data\v310\notifications_cron');
+	}
+
+	public function update_data()
+	{
+		return array(
+			// Make read_notification_last_gc dynamic.
+			array('config.remove', array('read_notification_last_gc')),
+			array('config.add', array('read_notification_last_gc', 0, 1)),
+		);
+	}
+}