Updated mediawiki/extensions
Project: mediawiki/extensions/MassMessage  87a7301ff62f457d7f1f7b025a9ba25100e86100

If the spamlist is a redirect, follow it. If it's an interwiki redirect, throw an error.

Change-Id: Iee96ccd1598ce7202b6467cd2e8e66d86dd44985