[Fix] Hide vanished players from server list pings

Essentials/src/com/earth2me/essentials/Essentials.java

@@ -282,9 +282,9 @@ private void registerListeners(PluginManager pm) {
             LOGGER.log(Level.INFO, "Registering Listeners");
         }
 
-        final EssentialsPluginListener serverListener = new EssentialsPluginListener(this);
-        pm.registerEvents(serverListener, this);
-        confList.add(serverListener);
+        final EssentialsPluginListener pluginListener = new EssentialsPluginListener(this);
+        pm.registerEvents(pluginListener, this);
+        confList.add(pluginListener);
 
         final EssentialsPlayerListener playerListener = new EssentialsPlayerListener(this);
         pm.registerEvents(playerListener, this);
@@ -307,6 +307,9 @@ private void registerListeners(PluginManager pm) {
         final EssentialsWorldListener worldListener = new EssentialsWorldListener(this);
         pm.registerEvents(worldListener, this);
 
+        final EssentialsServerListener serverListener = new EssentialsServerListener(this);
+        pm.registerEvents(serverListener, this);
+
         pm.registerEvents(tntListener, this);
 
         jails.resetListener();

Essentials/src/com/earth2me/essentials/EssentialsServerListener.java

@@ -0,0 +1,30 @@
+package com.earth2me.essentials;
+
+import net.ess3.api.IEssentials;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.server.ServerListPingEvent;
+
+import java.util.Iterator;
+
+
+public class EssentialsServerListener implements Listener {
+    private final transient IEssentials ess;
+
+    public EssentialsServerListener(final IEssentials ess) {
+        this.ess = ess;
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST)
+    public void onServerListPing(final ServerListPingEvent event) {
+        Iterator<Player> iterator = event.iterator();
+        while (iterator.hasNext()) {
+            Player player = iterator.next();
+            if (ess.getUser(player).isVanished()) {
+                iterator.remove();
+            }
+        }
+    }
+}