SocialProfile: bug #25337 - GENDER support for
[[MediaWiki:Useractivity-award]].

The username is now passed as the optional $2 parameter, which can then be
used to test for the user's gender, as noted in the documentation.

This seems to be working as intended, based on some rather quick tests.

Change-Id: I96c1933cf8db8933c3490e543be8ddfe9f35fdee