Updated mediawiki/extensions
Project: mediawiki/extensions/ZeroBanner  1f501b7c9f59eb18bda7257efc37d40d03237ac2

Ensure zerodot redirects stay on zerodot if OK

Also, shim in the optimal language code on the
language landing page before the other languages.
The optimal language code may not even be in showLangs,
which is totally cool in the case that the operator
zero-rates all languages. This shimming concept was
okay'd by the director and product tech manager.

Change-Id: I8cc307dd2cceb604b834ee6e23107e8b9c2e951d