* (bug 33304) list=allpages will no longer return duplicate entries when
querying protection.
* (bug 33304) list=allpages will now find really old indefinite protections.
+* (bug 45937) meta=allmessages will report a syntactically invalid lang as a
+ proper error instead of as an uncaught exception.
=== API internal changes in 1.21 ===
* For debugging only, a new global $wgDebugAPI removes many API restrictions when true.