Support more app servers than simply 'rails server'

[explainer]

We need to be able to support other ruby web servers, like Puma, Thin, etc. There is a method for monkey patching which works (thanks @votiakov), but it is hardly a method to use in a product sense.

I suggest adding something to config/initializers/hyperloop.rb that allows a developer to list a set of servers to use. That way, debugging and development could use 'rails server' as it currently does, but also support others in the list above for production use, when a daemon install is important.

[catmando]

@explainer is this still an issue?

[janbiedermann]

@catmando this depends on your latest hyper-operation patches to on_server?, that was the issue i believe