who don't have access to /tmp can specify an alternative.
* (bug 27283) SqlBagOStuff breaks PostgreSQL transactions.
* (bug 35727) mw.Api ajax() should put token parameter last.
-* (bug 260) Handle <pre> overflow automatically with a scroll bar.
* (bug 37708) mw.Uri.clone() should make a deep copy.
* (bug 38024) ResourceLoader should not create empty stylesheets for modules
that don't have stylesheets.