Added API to get player's proxy address (#10400)

patches/api/0478-Added-API-to-get-player-ha-proxy-address.patch

@@ -0,0 +1,27 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: nostalfinals <yuu8583@proton.me>
+Date: Mon, 8 Apr 2024 23:24:38 +0800
+Subject: [PATCH] Added API to get player ha proxy address
+
+
+diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
+index 8a1e39474af88188f2e1765731b57d349f0ee645..6c327a07bf8a6aa11a2d7dad12b2830acc539484 100644
+--- a/src/main/java/org/bukkit/entity/Player.java
++++ b/src/main/java/org/bukkit/entity/Player.java
+@@ -250,6 +250,16 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
+     @Nullable
+     public InetSocketAddress getAddress();
+ 
++    // Paper start - Add API to get player's proxy address
++    /**
++     * Gets the socket address of this player's proxy
++     *
++     * @return the player's proxy address, null if the server doesn't have Proxy Protocol enabled, or the player didn't connect to an HAProxy instance
++     */
++    @Nullable
++    public InetSocketAddress getHAProxyAddress();
++    // Paper end - Add API to get player's proxy address
++
+     /**
+      * Gets if this connection has been transferred from another server.
+      *