feat: LLAPI transport can receive port from uri (#1294)

* feat: LLAPI transport can receive port from uri

* Refactor to use the original method

Assets/Mirror/Runtime/Transport/LLAPITransport.cs

@@ -18,6 +18,8 @@ namespace Mirror
     [EditorBrowsable(EditorBrowsableState.Never), Obsolete("LLAPI is obsolete and will be removed from future versions of Unity")]
     public class LLAPITransport : Transport
     {
+        public const string Scheme = "unet";
+
         public ushort port = 7777;
 
         [Tooltip("Enable for WebGL games. Can only do either WebSockets or regular Sockets, not both (yet).")]
@@ -110,7 +112,9 @@ public override bool ClientConnected()
             return clientConnectionId != -1;
         }
 
-        public override void ClientConnect(string address)
+
+
+        void ClientConnect(string address, int port)
         {
             // LLAPI can't handle 'localhost'
             if (address.ToLower() == "localhost") address = "127.0.0.1";
@@ -131,6 +135,21 @@ public override void ClientConnect(string address)
             }
         }
 
+        public override void ClientConnect(string address)
+        {
+            ClientConnect(address, port);
+        }
+
+        public override void ClientConnect(Uri uri)
+        {
+            if (uri.Scheme != Scheme)
+                throw new ArgumentException($"Invalid url {uri}, use {Scheme}://host:port instead", nameof(uri));
+
+            int serverPort = uri.IsDefaultPort ? port : uri.Port;
+
+            ClientConnect(uri.Host, serverPort);
+        }
+
         public override bool ClientSend(int channelId, ArraySegment<byte> segment)
         {
             // Send buffer is copied internally, so we can get rid of segment