update dlna server friendly name

MediaBrowser.Dlna/Profiles/DefaultProfile.cs

@@ -15,10 +15,9 @@ namespace MediaBrowser.Dlna.Profiles
 
             XDlnaDoc = "DMS-1.50";
 
-            FriendlyName = "Emby";
             Manufacturer = "Emby";
             ModelDescription = "Emby";
-            ModelName = "Emby";
+            ModelName = "Emby Server";
             ModelNumber = "Emby";
             ModelUrl = "http://emby.media/";
             ManufacturerUrl = "http://emby.media/";

MediaBrowser.Dlna/Server/DescriptionXmlBuilder.cs

@@ -138,6 +138,11 @@ namespace MediaBrowser.Dlna.Server
 
         private string GetFriendlyName()
         {
+            if (string.IsNullOrWhiteSpace(_profile.FriendlyName))
+            {
+                return _serverName;
+            }
+
             var characters = _serverName.Where(c => (char.IsLetterOrDigit(c) || c == '-')).ToArray();
 
             var serverName = new string(characters);