code: function addDebugLogging () {
    var addLogging = function (fn) {
      return function (req, res, next) {
        req.log.debug(fn.name)
        fn(req, res, next)
      }
    }
    addLogging.params = 'req, res, next'
    addLoggingAnvil(addLogging)
  }
docs: For each log level that has been implemented, a function has been added
  below containing the desired logging statement, the original function
  call (either before or after as desired). This function accepts a 'fn'
  param which is a function (with matching parameter list) it will wrap.