Updated mediawiki/extensions
Project: mediawiki/extensions/CirrusSearch  f41ca4dc2b0d3be40e5797a10a1f6722417c0991

Scan plugins when building index

This'll be useful later when we actually can use the plugins....

Also improve error reporting a tiny bit.

Change-Id: I51fbc494bb203b385326de5568af85b934ad92f8