ghc trac wiki, rss feeds not activated?

a lot of ghc-related discussion takes place on ghc's trac wiki these days, as does the development of ghc docs. so i'd like to follow wiki changes as an rss feed. this is supported, according to http://hackage.haskell.org/trac/ghc/wiki/TracRss http://hackage.haskell.org/trac/ghc/wiki/TracTimeline unfortunately, i haven't seen that xml/rss icon on any ghc trac wiki page, and the url modifier is not otherwise documented, either. is that an optional feature that hasn't been activated? could rss feeds for the ghc trac wiki please be made available? claus