oc, pl, pt, rm, ro, ru, rup, sco, sk, sl, smn, sq, sr, sv, tk, tl, tr, tt, uk,
uz, vi.
* Added 'CategoryAfterPageAdded' and 'CategoryAfterPageRemoved' hooks.
+* Added 'HistoryRevisionTools' and 'DiffRevisionTools' hooks.
* (bug 33186) Add image rotation api "imagerotate"
* (bug 34040) Add "User rights management" link on user page toolbox.
* (bug 42184) $wgUploadSizeWarning missing second variable
* (bug 40326) Check if files exist with a different extension during uploading
* (bug 34798) Updated CSS for Atom/RSS recent changes feeds to match on-wiki diffs.
+* (bug 42430) Calling numRows on MySQL no longer propagates unrelated errors.
+* (bug 44719) Removed mention of non-existing maintenance/migrateCurStubs.php
+ script in includes/DefaultSettings.php
=== API changes in 1.21 ===
* prop=revisions can now report the contentmodel and contentformat.