Send LOGIN protocol packets immediately - Fix disconnect during async prelogin

Spigot-Server-Patches/0346-Optimize-Network-Manager-and-add-advanced-packet-sup.patch

@@ -24,7 +24,7 @@ This should solve some deadlock risks
 Part of this commit was authored by: Spottedleaf
 
 diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
-index b1dededc15cce686ead74a99bee64c89ac1de22c..d24d7df807287c51a8dd5ecf4f7c842b7cdf3976 100644
+index b1dededc15cce686ead74a99bee64c89ac1de22c..35085ca3992e7c21139540d0c404e1568f28a275 100644
 --- a/src/main/java/net/minecraft/server/NetworkManager.java
 +++ b/src/main/java/net/minecraft/server/NetworkManager.java
 @@ -64,6 +64,10 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
@@ -73,7 +73,7 @@ index b1dededc15cce686ead74a99bee64c89ac1de22c..d24d7df807287c51a8dd5ecf4f7c842b
 +        }
 +        // Paper start
 +        private static boolean canSendImmediate(NetworkManager networkManager, Packet<?> packet) {
-+            return networkManager.isPending || networkManager.protocol == EnumProtocol.HANDSHAKING || networkManager.protocol == EnumProtocol.STATUS || networkManager.queueImmunity ||
++            return networkManager.isPending || networkManager.protocol != EnumProtocol.PLAY || networkManager.queueImmunity ||
 +                packet instanceof PacketPlayOutKeepAlive ||
 +                packet instanceof PacketPlayOutChat ||
 +                packet instanceof PacketPlayOutTabComplete;