* Explicit error messages expected list does not match extracted by code
* Support for distrinktion between empty list and undefined list
* Added feature "single scenario"
* Added feature "disable scenarios" for one run
* Corrected bug that created undefined IP address when IP addresses were
  extracted from name/IP expressions an expression was name only
* Replaced built in IP address verification against from Zonemaster library

* Adds more scenarios/unit tests
* Updates unit tests
* Adds support for running a single scenario or
  temporarily disable a scenario or list of scenarios

Co-authored-by: Marc van der Wal <103426270+marc-vanderwal@users.noreply.github.com>

- Fix support of name servers without IP addresses in input data hash
- Update unit tests
- Update unit test data

- Fix support of name servers without IP address
- Add check for existence of single scenario
- Update unit test and unit test data

…t data

Co-authored-by: Marc van der Wal <103426270+marc-vanderwal@users.noreply.github.com>