Make history messages per channel configurable

fjerkroa_bot/ai_responder.py

@@ -207,7 +207,7 @@ class AIResponder(object):
         else:
             current = self.history[index]
             count = sum(1 for item in self.history[index:] if item.get('channel') == current.get('channel'))
-            if count > 3:
+            if count > self.config.get('history-per-channel', 3):
                 del self.history[index]
             else:
                 self.shrink_history_by_one(index + 1)