* (bug 24620) Add types to LogFormatter.
* jQuery JSON upgraded from 2.3 to 2.4.0.
* Added GetDoubleUnderscoreIDs hook, for modifying the list of magic words.
+* DatabaseUpdater class has two new methods to ease extensions schema changes:
+ dropExtensionIndex and renameExtensionIndex.
=== Bug fixes in 1.21 ===
* (bug 40353) SpecialDoubleRedirect should support interwiki redirects.
the same query. When both are present, 'from' is simply ignored.
* list=alllinks & alltransclusions now allow 'unique' in generators, to yield
a list of all link/template target pages instead of source pages.
+* BREAKING CHANGE: list=logevents output format changed for details of some log
+ types. Specifically, details that were formerly reported under a key like
+ "4::foo" will now be reported under a key of simply "foo".
=== Languages updated in 1.21 ===