Translations:Manual:$wgConf/21/en

Arrays can now be merged. This might be useful for $GroupPermissions. To use it, you have to prefix the keys with a "+" for the settings you want to merge. The two possibilities can be used together.
 * To merge your customized version of the setting with the one in DefaultSettings.php, prefix the setting's name with "+" (such as )
 * To merge a more specific level with a less-specific one, prefix the level with a "+".