[ticket/15518] Add a setting to toggle permission checks for pms in viewtopic

PHPBB3-15518

phpBB/phpbb/db/migration/data/v32x/enable_accurate_pm_button.php

@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class enable_accurate_pm_button extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v322',
+		);
+	}
+
+	public function effectively_installed()
+	{
+		return isset($this->config['enable_accurate_pm_button']);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('enable_accurate_pm_button', '1')),
+		);
+	}
+}