on channel_nick

Triggered by other people's nick changes.

This event is thrown each time someone (including you) on one of your channels changes nickname. If the nick changer is on multiple channels with you, multiple events are thrown.

If you don't suppress this event, the client will throw an on nickname event.

To make a distinction between the client changing nicks and other people:

 on ^channel_nick '% $servernick() *' (chan, oldnick, newnick) {
    xecho -b You have changed nicks to $newnick;
 };
 on ^channel_nick * (chan, oldnick, newnick) {
    if (iscurchan($chan)) {
       xecho -b $oldnick has changed nicks to $newnick;
    } else {
       xecho -b $oldnick has changed nicks to $newnick on $chan;
    };
 };

This already existed in ircII.