Don't try and lookup profiles that have no UUID and no name

Closes GH-347

Spigot-Server-Patches/0165-Don-t-lookup-game-profiles-that-have-no-UUID-and-no-.patch

@@ -0,0 +1,22 @@
+From e532493e81d1c1c59e0aba8b72a1ba0de6688642 Mon Sep 17 00:00:00 2001
+From: Zach Brown <zach.brown@destroystokyo.com>
+Date: Sat, 16 Jul 2016 19:11:17 -0500
+Subject: [PATCH] Don't lookup game profiles that have no UUID and no name
+
+
+diff --git a/src/main/java/net/minecraft/server/UserCache.java b/src/main/java/net/minecraft/server/UserCache.java
+index 989758c..1c619c5 100644
+--- a/src/main/java/net/minecraft/server/UserCache.java
++++ b/src/main/java/net/minecraft/server/UserCache.java
+@@ -86,7 +86,7 @@ public class UserCache {
+         };
+ 
+         gameprofilerepository.findProfilesByNames(new String[] { s}, Agent.MINECRAFT, profilelookupcallback);
+-        if (!d() && agameprofile[0] == null) {
++        if (!d() && agameprofile[0] == null && !org.apache.commons.lang3.StringUtils.isBlank(s)) { // Paper - Don't lookup a profile with a blank name
+             UUID uuid = EntityHuman.a(new GameProfile((UUID) null, s));
+             GameProfile gameprofile = new GameProfile(uuid, s);
+ 
+-- 
+2.9.0
+