Updated mediawiki/extensions
Project: mediawiki/extensions/CentralAuth  49c2d13b00c0d87a1eb9ec267e9e2509f2fb9720

Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: Ib9f09372823170175350e40d5dd13ca8e9b71706