[ticket/15176] Add setting for user activity display limit.

Up to phpBB 3.2 the maximum number of posts a user must have to have his
activity shown is 5000. This limit is hardcoded in functions_display.php.
It would be useful if board administrators could choose to disable the
limit or to set an higher value.

PHPBB3-15176

phpBB/phpbb/db/migration/data/v32x/load_user_activity_limit.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 load_user_activity_limit extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\v320',
+		);
+	}
+
+	public function effectively_installed()
+	{
+		return isset($this->config['load_user_activity_limit']);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('load_user_activity_limit', '5000')),
+		);
+	}
+}