Checkmaster

- fix: exit status 1 when at least a rule fails, resolves https://github.com/4Securitas/checkmaster/issues/2

**Full Changelog**: https://github.com/4Securitas/checkmaster/compare/0.9.6...0.9.7

What's Changed
* Added ipv6 support in status message
* Fixed other private ipv4 addresses in status message
* Fixed some typoes and grammar in readme.md by gianmarcodonnici in https://github.com/4Securitas/checkmaster/pull/1

New Contributors
* gianmarcodonnici made their first contribution in https://github.com/4Securitas/checkmaster/pull/1

**Full Changelog**: https://github.com/4Securitas/checkmaster/commits/0.9.6