[x] FAQ add RFC Editor: Please remove this section before publication.
[x] Ratelimit fields currenty used, add RFC Editor: Please remove this section before publication. because it is only useful to explain current design choices. Once this is published and decisions are taken, it's not useful anymore.
"Acknowledgements" should be last in the spec, and unnumbered.
Why, on the other hand, is "RateLimit fields currently used on the web" unnumbered?