Config should yell and warn about float values being cast to ints

[MadLittleMods]

Wherever an int is used for a config value, if someone accidentally provides a float number value, it will get floored (rounded down).

This can lead to misconfigurations like specifying 0.5 for the rate limiting burst_count which will get rounded down to 0 and not allow requests at all (real example: #18159).