Chained hooks

I would love to have a hook that provides an around, rather than a before or after.

The before hook is meant to perform some checks and we're utilizing the halt flag after a before hook to check whether the hook asked to stop a request, simply because the before hook wasn't intended for that.

What people really need is an around hook. It will allow you to add information, send the request along (or not), and applying changes on a return, just like a Plack middleware.

Then we could deprecating changing the response (and stopping the request) from the before hook - which I honestly abhor. A lot of our problems have to do with having a response before there's a response, most of it for the before hook.

What do you think?

The issue names no files, tests, or entry points. Start by tracing the existing before and after hook handling and its halt and response behavior; the work is done when an around hook's request and return flow is defined and covered without relying on the current before-hook response changes.