Add copyright notice

Author: pont-us

xrenmap/xrenmap.py

@@ -1,3 +1,7 @@
+# Copyright (c) 2025 by Brockmann Consult GmbH
+# Permissions are hereby granted under the terms of the MIT License:
+# https://opensource.org/licenses/MIT.
+
 from collections.abc import Iterable
 import logging
 import os