Merge remote-tracking branch 'Marc/ticket/12150' into develop-ascraeus

* Marc/ticket/12150:
  [ticket/12150] Use correct license URL in prune shadow migrations file
  [ticket/12150] Remove 'after' for columns from migrations file
  [ticket/12150] Update schema files for prune shadow topics
  [ticket/12150] Use log service instead of add_log() function
  [ticket/12150] Use shorter column names for prune settings
  [ticket/12150] Add functional tests for pruning shadow topics
  [ticket/12150] Add missing space to query for shadow topics
  [ticket/12150] Add missing prune settings variables in acp_forums
  [ticket/12150] Add file and caller for pruning shadow topics
  [ticket/12150] Add prune columns to schema files and migration file
  [ticket/12150] Add options to acp

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

@@ -0,0 +1,46 @@
+<?php
+/**
+*
+* @package migration
+* @copyright (c) 2014 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+namespace phpbb\db\migration\data\v310;
+
+class prune_shadow_topics extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array('\phpbb\db\migration\data\v310\dev');
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'add_columns'		=> array(
+				$this->table_prefix . 'forums'		=> array(
+					'enable_shadow_prune'	=> array('BOOL', 0),
+					'prune_shadow_days'	=> array('UINT', 7),
+					'prune_shadow_freq'	=> array('UINT', 1),
+					'prune_shadow_next'	=> array('INT:11', 0),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_columns'		=> array(
+				$this->table_prefix . 'forums'		=> array(
+					'enable_shadow_prune',
+					'prune_shadow_days',
+					'prune_shadow_freq',
+					'prune_shadow_next',
+				),
+			),
+		);
+	}
+}