tweak order of family/protocol discovery in CreateSocket, so we use consistent values

StackExchange.Redis/StackExchange/Redis/SocketManager.cs

@@ -124,12 +124,13 @@ private void Dispose(bool disposing)
 
         internal static Socket CreateSocket(EndPoint endpoint)
         {
-            var protocolType = endpoint.AddressFamily == AddressFamily.Unix ? ProtocolType.Unspecified : ProtocolType.Tcp;
             var addressFamily = endpoint.AddressFamily;
             if (addressFamily == AddressFamily.Unspecified && endpoint is DnsEndPoint)
             {   // default DNS to ipv4 if not specified explicitly
                 addressFamily = AddressFamily.InterNetwork;
             }
+
+            var protocolType = addressFamily == AddressFamily.Unix ? ProtocolType.Unspecified : ProtocolType.Tcp;
             var socket = new Socket(addressFamily, SocketType.Stream, protocolType);
             SocketConnection.SetRecommendedClientOptions(socket);
             return socket;