[Add]
1.You can send a duel request by [SHIFT]+[RIGHT CLICK] a player.
2.Dan protection.You can set an Exp gap.If the gap of dan Exp between you and your opponent is greater than it,you will not gain Exp/lose Exp.
[Fix]
A bug that the commands '/dt s rdes' and '/dt s rbc' is unavailable sometimes

If you want to ban the function that sending a duel request by click.You can add a line 'BanClickToSend: true' to the config.yml
And if you want to set the gap.Just add a line 'ProtectionExp: value' to the config.yml.Set '0' to disable this function.