Add new config options for facturx and xrechnung

Services.ZUGFeRDService/Config.vb

@@ -34,6 +34,10 @@
         Public Property RejectionTransferEnabled As Boolean = True
         Public Property RejectionTransferTimeUnit As String = "HOUR"
         Public Property RejectionTransferTimeValue As Integer = 12
+
+        Public Property AllowFacturX As Boolean = True
+        Public Property AllowXRechnung As Boolean = True
+
     End Class
 
     Public Class FirebirdConfig