Fix users getting deleted when the nick change is only a case change
Fix users getting deleted when the nick change is only a case change

iwalkalone69/kiwiirc,prawnsalad/kiwiirc-next,kiwiirc/kiwiirc,prawnsalad/kiwiirc-next,ItsOnlyBinary/kiwiirc,iwalkalone69/kiwiirc,ItsOnlyBinary/kiwiirc,kiwiirc/kiwiirc,kiwiirc/kiwiirc,ItsOnlyBinary/kiwiirc,iwalkalone69/kiwiirc