Adding log message for when the lancache has been detected.

DepotDownloader/Program.cs

@@ -123,6 +123,10 @@ namespace DepotDownloader
             if (HasParameter(args, "-use-lancache"))
             {
                 await Client.DetectLancacheServerAsync();
+                if (Client.UseLancacheServer)
+                {
+                    Console.WriteLine("Detected Lancache server! Downloads will be directed through the Lancache.");
+
                     // Increasing the number of concurrent downloads when the cache is detected since the downloads will likely
                     // be served much faster than over the internet.  Steam internally has this behavior as well.
                     if (!HasParameter(args, "-max-downloads"))
@@ -130,6 +134,7 @@ namespace DepotDownloader
                         ContentDownloader.Config.MaxDownloads = 25;
                     }
                 }
+            }
 
             ContentDownloader.Config.MaxDownloads = GetParameter(args, "-max-downloads", 8);
             ContentDownloader.Config.MaxServers = Math.Max(ContentDownloader.Config.MaxServers, ContentDownloader.Config.MaxDownloads);