message: Set do not track to false if it doesn't exist
diff: @@ -11,6 +11,6 @@ module.exports = (req, res, next) ->
  res.locals.homeHref = req.user?.homePath() or '/'
  # Respect do not track headers
  - res.locals.doNotTrack = res.locals.sd.DO_NOT_TRACK = req.headers.dnt
  + res.locals.doNotTrack = res.locals.sd.DO_NOT_TRACK = req.headers.dnt || false
  next()
  