Reduce spam by removing the confirmation message.

[jsimonet]

Each time a point is attributed to a user, the bot respond to the channel saying he acknowledged the addition. This can generates some spam messages.

Proposition: add a configuration allowing to define if the bot should print the response or not (ideally, by channels).

IRC::Client::Plugin::UserPoints.new( :msg-confirm-addition( chan2 => True ) ); # Defaults to False