update file headers with license information (SPDX)
diff --git a/examples/wxSerialConfigDialog.py b/examples/wxSerialConfigDialog.py
index 6b1a1db..3a2a83d 100755
--- a/examples/wxSerialConfigDialog.py
+++ b/examples/wxSerialConfigDialog.py
@@ -1,7 +1,12 @@
#!/usr/bin/env python
-# generated by wxGlade 0.3.1 on Thu Oct 02 23:25:44 2003
+#
+# A serial port configuration dialog for wxPython. A number of flags can
+# be used to cinfugure the fields that are displayed.
+#
+# (C) 2001-2015 Chris Liechti <cliechti@gmx.net>
+#
+# SPDX-License-Identifier: BSD-3-Clause
-#from wxPython.wx import *
import wx
import serial
import serial.tools.list_ports