The duck generation module listens to the "duck" command. It will
then generate a random duck based on https://github.com/adyxax/hsbot
with some additional heads and beaks.
* Nicknames were assumed to be in [A-Za-z] format. Just detecting
a [^!] now as ! separates the nickname from the host.
* Channels may start with two hashes, the previous regexp didn't
recognize that.
