21/10/2008 0.1.1 (courgette)    - extends Censor plugin v2.1.0
                                - move added mute code from xlr8or to that new plugin
                                - changed _muteonly to _warnafter, so after a defined number of mute, the client get warned
22/10/2008 0.1.2 (xlr8or)       - added slap function
25/03/2015 0.1.3 (Fenix)        - made censorurt a built-in plugin
                                - fix indent
03/08/2015 0.2    Thomas LEVEIL - add config for messages mute_announcement and pm_unmuted