Push illegal char kick to main thread (#7363)

patches/server/Kick-on-main-for-illegal-chars.patch

@@ -0,0 +1,20 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nassim Jahnke <nassim@njahnke.dev>
+Date: Mon, 17 Jan 2022 19:47:19 +0100
+Subject: [PATCH] Kick on main for illegal chars
+
+
+diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
++++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+@@ -0,0 +0,0 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
+ 
+         for (int i = 0; i < s.length(); ++i) {
+             if (!SharedConstants.isAllowedChatCharacter(s.charAt(i))) {
++                this.server.scheduleOnMain(() -> { // Paper - push to main for event firing
+                 this.disconnect(new TranslatableComponent("multiplayer.disconnect.illegal_characters"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_CHARACTERS); // Paper - add cause
++                }); // Paper - push to main for event firing
+                 return;
+             }
+         }