(bug 67966) Add GENDER support for recipient

As outlined on https://translatewiki.net/wiki/Thread:Support/MediaWiki:Notification-flow-thanks/en_and_MediaWiki:Notification-flow-thanks/fr

Bug: 67966
Change-Id: Ia3888b5c0f39fe1cb7507b7e5990aefe2357a09f
Merge "(bug 67966) Add GENDER support for recipient"