Better rate controllability

[muety]

With the rate limiter, you are currently very constrained in what you can configure as a rate, because only limited so per second and per minute rates. Would be helpful to have rates like 100r/24h or so.

[decaf-dev]

I am looking for something like 100r/15m.

[PikachuEXE]

I am considering https://github.com/mholt/caddy-ratelimit