* Allow boolean flags in the matched `--foo` and `--no-foo` format.
* test for it
* Godoc for new functions
* Copyright date update
* Disallow user from setting either flag to false explicitly. Moar tests, for this & other cases
* Apply suggestions from code review
Co-Authored-By: Roland Huß <rhuss@redhat.com>
* Fixup
Naomi Seyfer