Implemented countdowns.

FFXIVClassic Map Server/packets/receive/CountdownRequestPacket.cs

@@ -0,0 +1,30 @@
+using System;
+using System.IO;
+
+namespace FFXIVClassic_Map_Server.packets.receive
+{
+    class CountdownRequestPacket
+    {
+        public bool invalidPacket = false;
+        public byte countdownLength;
+        public ulong syncTime;
+
+        public CountdownRequestPacket(byte[] data)
+        {
+            using (MemoryStream mem = new MemoryStream(data))
+            {
+                using (BinaryReader binReader = new BinaryReader(mem))
+                {
+                    try{
+                        countdownLength = binReader.ReadByte();
+                        binReader.BaseStream.Seek(8, SeekOrigin.Begin);
+                        syncTime = binReader.ReadUInt64();
+                    }
+                    catch (Exception){
+                        invalidPacket = true;
+                    }
+                }
+            }
+        }
+    }
+}