like "headlinks", "skinnameclass", etc. to be defined.
* The deprecated 'SpecialVersionExtensionTypes' hook was removed.
* (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.
==== Renamed classes ====
* CLDRPluralRuleConverter_Expression to CLDRPluralRuleConverterExpression