Add an option to override ignore private apis

[vStone]

No description provided.

[ekohl]

I looked into a cleaner way to add configuration but it looks like there isn't really a good way. Perhaps it can be simplified to

Suggested change

	ignore_private = PuppetLint.configuration.docs_ignore_private_api.nil? ? true : PuppetLint.configuration.docs_ignore_private_api
	ignore_private = PuppetLint.configuration.docs_ignore_private_api.nil? || PuppetLint.configuration.docs_ignore_private_api

Not sure if it's cleaner. The cleanest way would be to have an API to also add a default.

Perhaps a much better way is to avoid the negative name and name it docs_check_private_params. That can default to false. Since nil and false are equivalent in this case, it would solve the problem.

The only downside is that the unless condition becomes more complex, but overall I think it's a win. Let me know what you think.

[vStone]

I have no opinion on the naming. adjustments have been made :)

[ekohl]

Small nits, otherwise 👍

[ekohl]

nil and false evaluate to the same

Suggested change

	check_private = PuppetLint.configuration.docs_check_private_params || false
	check_private = PuppetLint.configuration.docs_check_private_params

[ekohl]

Ruby uses && instead of and (same for || vs or)

Suggested change

	unless is_private and not check_private
	unless is_private && !check_private