Fix Player Banning

This issue stems from the fact that Bukkit's API only allows a UUID to be banned, but Minecraft requires both a UUID and name. To fix this we modify the code to require a UUID or a name, or both. The correct fix would be expanding the API to be able to provide a name, however this would require plugin changes.

By: md_5 <git@md-5.net>

paper-server/patches/sources/net/minecraft/server/players/UserBanListEntry.java.patch

@@ -5,3 +5,38 @@
  package net.minecraft.server.players;
  
  import com.google.gson.JsonObject;
+@@ -39,20 +40,29 @@
+ 
+     @Nullable
+     private static GameProfile createGameProfile(JsonObject json) {
+-        if (json.has("uuid") && json.has("name")) {
++        // Spigot start
++        // this whole method has to be reworked to account for the fact Bukkit only accepts UUID bans and gives no way for usernames to be stored!
++        UUID uuid = null;
++        String name = null;
++        if (json.has("uuid")) {
+             String s = json.get("uuid").getAsString();
+ 
+-            UUID uuid;
+-
+             try {
+                 uuid = UUID.fromString(s);
+             } catch (Throwable throwable) {
+-                return null;
+             }
+ 
+-            return new GameProfile(uuid, json.get("name").getAsString());
++        }
++        if ( json.has("name"))
++        {
++            name = json.get("name").getAsString();
++        }
++        if ( uuid != null || name != null )
++        {
++            return new GameProfile( uuid, name );
+         } else {
+             return null;
+         }
++        // Spigot End
+     }
+ }