* (bug 39957) Added $wgUnwatchedPageThreshold, specifying minimum count
of page watchers required for the number to be accessible to users
without the unwatchedpages permission.
+* $wgPageInfoTransclusionLimit limits the list size of transcluded articles
+ on the info action. Default is 50.
=== New features in 1.21 ===
* (bug 38110) Schema changes (adding or dropping tables, indicies and
debug mode: wfMsg, wfMsgNoTrans, wfMsgForContent, wfMsgForContentNoTrans,
wfMsgReal, wfMsgGetKey, wfMsgHtml, wfMsgWikiHtml, wfMsgExt, wfEmptyMsg. Use
the Message class, or the global method wfMessage.
+* Added $wgEnableCanonicalServerLink, off by default. If enabled, a
+ <link rel=canonical> tag is added to every page indicating the correct server
+ to use.
* Debug message emitted by wfDebugLog() will now be prefixed with the group
name when its logged to the default log file. That is the case whenever the
group has no key in wgDebugLogGroups, that will help triage the default log.
* (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.