Removed duplicate 0xD9 packet. Renamed 0xD8 to SetActorBGPropertiesPacket.

FFXIVClassic Map Server/packets/send/Actor/SetActorBGPropertiesPacket.cs

@@ -0,0 +1,29 @@
+using System.IO;
+
+using FFXIVClassic.Common;
+using System;
+
+namespace  FFXIVClassic_Map_Server.packets.send.actor
+{
+    class SetActorBGPropertiesPacket
+    {
+        public const ushort OPCODE = 0x00D8;
+        public const uint PACKET_SIZE = 0x28;
+
+        public static SubPacket BuildPacket(uint sourceActorId, uint val1, uint val2)
+        {
+            byte[] data = new byte[PACKET_SIZE - 0x20];
+
+            using (MemoryStream mem = new MemoryStream(data))
+            {
+                using (BinaryWriter binWriter = new BinaryWriter(mem))
+                {
+                    binWriter.Write((UInt32)val1);
+                    binWriter.Write((UInt32)val2);
+                }
+            }
+
+            return new SubPacket(OPCODE, sourceActorId, data);
+        }
+    }
+}