* (bug 63891) Add 'X-Robots-Tag: noindex' header in action=render pages.
* SpecialPage no longer supports the syntax for invoking wfSpecial*() functions.
All special pages should subclass SpecialPage and implement the execute() method.
+* The skin autodiscovery mechanism has been deprecated and will be removed in
+ MediaWiki 1.25. See https://www.mediawiki.org/wiki/Manual:Skin_autodiscovery
+ for migration guide for creators and users of custom skins that relied on it.
==== Renamed classes ====
* CLDRPluralRuleConverter_Expression to CLDRPluralRuleConverterExpression