+* $wgAllowAsyncCopyUploads and $CopyUploadAsyncTimeout were removed. This was an
+ experimental feature that has never worked.
+* Login and createaccount tokens now vary by timestamp.
+* LoginForm::getLoginToken() and LoginForm::getCreateaccountToken()
+ return a MediaWiki\Session\Token, and tokens must be checked using that
+ class's methods.
+* $wgEnotifUseJobQ was removed and the job queue is always used.
+* The functionality of the ApiSandbox extension has been merged into core. The
+ extension should no longer be used.