I am working on a feature branch in this area where you will be able to even set up your own strategy for the middleware. I expect to merge it soon.
I would consider supporting a setting like `ss.http.set({ sessionMiddleware:false })`. However it might be better to have a couple of strategies to switch between. For instance
* Minimal (just static and assets)
* Sessionless (no cookie parser and session handling)
* Default (as it is)
You would be able to set a strategy by `ss.http.set({ strategy: 'minimal' })`.
What you suggest about prepending makes sense.