If ducks-enabled is false, the bot should ignore ,bef etc.

[fndax]

Current behavior:

<@dax> ,config c ducks-enabled off
< bitbot> [Config] Config 'ducks-enabled' set to False
< cool-person> ,bef
< cool-person> [Ducks] cool-person: There was no duck!

Expected behavior:
If ducks aren't enabled, there is never gonna be a duck, so commands like befriend, trap, etc. should be ignored instead of giving "There was no duck!" output.