Recently you make some changes about the max-keys verification,as shown below:

Honestly speaking, I can't say there's anything wrong with this, after all, AWS does it this way. But in MinIO, if I use max-keys greater than 1000, it will be changed to 1000 instead of returning error 400.
I don't want to discuss whether AWS or Minio is better in this matter, but from my perspective, less strong validation should be compatible with more usage cases. So I think if max-keys exceeds 1000, it should be better to change max-keys to 1000 instead of returning an error directly.