errors in the configuration of the middleware are critical now.

http.go

@@ -247,7 +247,10 @@ func (s *Server) Setup() {
 		site.Init(group)
 	}
 	for _, middleware := range s.advmiddleware {
-		middleware.Sites(maptoarray(s.sites))
+		if err := middleware.Sites(maptoarray(s.sites)); err != nil {
+			log.Error().Err(err).Msg("Failed to setup midddleware. Stopping with the setup")
+			return
+		}
 	}
 	for cfg, site = range s.sites {
 		config := s.Conf.Sites[cfg]