add permalinks route constraint

config/application.rb

@@ -148,14 +148,6 @@ module Discourse
     require 'auth'
     Discourse.activate_plugins! unless Rails.env.test? and ENV['LOAD_PLUGINS'] != "1"
 
-    # FIXME: needs to work with engines such as docker manager
-    # this mounts routes_last before the engine, one option here if a hook is to hard
-    # is to add a constraint on the route that ensures its only captured if its a permalink
-    #
-    # initializer :add_last_routes, :after => :add_routing_paths do |app|
-    #   app.routes_reloader.paths << File.join(Rails.root, 'config', 'routes_last.rb')
-    # end
-
     config.after_initialize do
       # So open id logs somewhere sane
       OpenID::Util.logger = Rails.logger