Updated mediawiki/extensions
Project: mediawiki/extensions/ZeroRatedMobileAccess  a2094717eb73a04b1be7a506669bb5db40158476

Re-added legacy compatibility for 'sites' setting

Just to be on the safer side for now, keep the compatibility
'sites' param validation. It can be removed a bit later
once we are certain that all memcached values have long expired.

Change-Id: Ie34f1244b6f4b3dc401feb45bc9929968d55b735