no documentation regarding redirections

I guess I have to use `err307` from my handler to redirect user to some external website
(I need that part of my openid connect flow)

I think it should have first class support.
As of now, types do not represent current behaviour.

how about a list of potential redirect urls ?

---

also related
https://www.wikiwand.com/en/HATEOAS has a concept of related ressources / links
eg:

``` html
HTTP/1.1 200 OK
Content-Type: application/xml
Content-Length: ...

12345
100.00





```

I think those should probably be modelled too