feat: Log errors when Relay/WebSocket settings are mismatched (#2715)

Co-authored-by: Noel Stephens <noel.stephens@unity3d.com>

Author: simon-lemay-unity

com.unity.netcode.gameobjects/Runtime/Transports/UTP/UnityTransport.cs

@@ -1562,6 +1562,21 @@ public void CreateDriver(UnityTransport transport, out NetworkDriver driver,
             }
 #endif
 
+#if UTP_TRANSPORT_2_1_ABOVE
+            if (m_ProtocolType == ProtocolType.RelayUnityTransport)
+            {
+                if (m_UseWebSockets && m_RelayServerData.IsWebSocket == 0)
+                {
+                    Debug.LogError("Transport is configured to use WebSockets, but Relay server data isn't. Be sure to use \"wss\" as the connection type when creating the server data (instead of \"dtls\" or \"udp\").");
+                }
+
+                if (!m_UseWebSockets && m_RelayServerData.IsWebSocket != 0)
+                {
+                    Debug.LogError("Relay server data indicates usage of WebSockets, but \"Use WebSockets\" checkbox isn't checked under \"Unity Transport\" component.");
+                }
+            }
+#endif
+
 #if UTP_TRANSPORT_2_0_ABOVE
             if (m_UseWebSockets)
             {

com.unity.netcode.gameobjects/Runtime/com.unity.netcode.runtime.asmdef

@@ -36,6 +36,11 @@
             "name": "com.unity.transport",
             "expression": "2.0.0-exp",
             "define": "UTP_TRANSPORT_2_0_ABOVE"
+        },
+        {
+            "name": "com.unity.transport",
+            "expression": "2.1.0",
+            "define": "UTP_TRANSPORT_2_1_ABOVE"
         }
     ]
 }