padrino/padrino-framework — pull request #1545 by skade (2014-01-03 14:52:55+00:00)
Title: Roll-your-own session stores are broken

https://github.com/padrino/padrino-framework/blob/master/padrino-core/lib/padrino-core/application.rb#L369

makes it impossible to replace the session store, because that requires to switch `sessions` to `false`.