Manual:DefaultSettings.php

DefaultSettings.php contains default config-settings>Special:MyLanguage/Manual:Configuration settings|configuration settings. DefaultSettings.php should not be edited, since any changes made to it will be lost when MediaWiki is upgrading>Special:MyLanguage/Manual:Upgrading|upgraded. Rather, changes should be made to localsettings>Special:MyLanguage/Manual:LocalSettings.php|LocalSettings.php.

Link

 * https://svn.wikimedia.org/doc/DefaultSettings_8php_source.html
 * https://github.com/wikimedia/mediawiki-core/blob/master/includes/DefaultSettings.php