Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  fd84a8ffb51afa889f0412086b95efa527c38379

Restoring "Implement multiPut method."

This restores https://gerrit.wikimedia.org/r/#/c/120734/,
addresses the rev_content/rev_content_url cache issue

Change-Id: Ie59d5db8989dc3b81374f54732b47f6b220fe10b