Add licence and update description

docs/user/bots.rst

@@ -3267,7 +3267,12 @@ Truncate By Delimiter
 * `max_length`: max string length
 * `field`: string field
 
-Example: Cut through a long domain with a dot.
+Example: Cut through a long domain with a dot. Truncated until the domain not exceeds the maximum length.
+
+input domain = www.subdomain.web.secondsubomain.test.domain.com
+delimiter = '.'
+max_length = 20
+results = test.domain.com
 
 .. _intelmq.bots.experts.truncate_by_delimiter.expert:
 

intelmq/bots/experts/truncate_by_delimiter/expert.py

@@ -1,6 +1,9 @@
 # -*- coding: utf-8 -*-
 """
 Cut string if length is bigger than max
+
+SPDX-FileCopyrightText: 2021 Marius Karotkis <[email protected]>
+SPDX-License-Identifier: AGPL-3.0-or-later
 """
 from intelmq.lib.bot import Bot
 

intelmq/tests/bots/experts/truncate_by_delimiter/test_expert.py

@@ -1,6 +1,9 @@
 # -*- coding: utf-8 -*-
 """
 Testing truncate by delimiter bot
+
+SPDX-FileCopyrightText: 2021 Marius Karotkis <[email protected]>
+SPDX-License-Identifier: AGPL-3.0-or-later
 """
 import unittest
 import intelmq.lib.test as test