* Added HTMLAutoCompleteSelectField.
* Added a new hook, "SkinPreloadExistence", to allow extensions to add titles to
link existence cache before the page is rendered.
+* Config::set() was moved to its own interface, MutableConfig. GlobalVarConfig::set()
+ is now deprecated, does not implement MutableConfig.
+* A MutableConfig named HashConfig was added, that stores an array of configuration
+ settings.
+* (bug 69418) A MultiConfig implementation was added that supports fallback
+ to multiple Config instances.
=== Bug fixes in 1.24 ===
* (bug 50572) MediaWiki:Blockip should support gender