test: enable cyrillic punycode test case
The test from RFC 3492 contains a bug: the uppercase D in the input should be lower-cased. Fix that and enable the test.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
The test from RFC 3492 contains a bug: the uppercase D in the input should be lower-cased. Fix that and enable the test.