Make post count cooldown per channel instead of global #3
Description
Right now the spam module tracks now many messages have been posted and bases its decision to spam or not based on that count. However the count is global, so if channel A is a lot more popular than channel B but channel B tends to contain more spam triggers, then almost every message in channel B will get a spam reply, which is unideal. So the cooldown counter needs to be tracked on a per channel basis.