URL Server Rewrites

[ivoilic]

Currently it's impossible to rewrite (not redirect) a request internally on the server side without manually proxying the request which can be complex and risky if implemented improperly. It would be great to have a rewrite function similar to the existing redirect function that can used in the handle server-hook.

By rewrite I mean serving content from another path while preserving the request URL while retaining the ability to set headers, cookies, etc.