Deprecation warning during upgrade
rake generate_session_store (in /tmp/redmine) DEPRECATION WARNING: Rake tasks in vendor/plugins/engines/tasks and vendor/plugins/open_id_authentication/tasks are deprecated. Use lib/tasks instead. (called from /tmp/redmine/vendor/rails/railties/lib/tasks/rails.rb:10)
but the upgrade instructions neither warn me about it, nor tell me if I have to be concerned about it.