is configurable via $wgSessionPbkdf2Iterations.
* Upload dialog's file upload log comment can now be configured separately for
local and foreign uploads.
+* $wgForeignUploadTargets now defaults to `[ 'local' ]`, where `'local'`
+ signifies local uploads. A value of `[]` (empty array) now means that
+ no upload targets are allowed, effectively disabling the upload dialog.
=== New features in 1.28 ===
* User::isBot() method for checking if an account is a bot role account.