Re: vnconfig: fix usage

[Todd C . Miller]

On Fri, 19 Aug 2022 18:32:12 -0000, Klemens Nanni wrote:

> The manual has it right about -k and -K being mutually exclusive;
> adapt the internal text.
>
> Merge the printf calls while here.

OK millert@ for making usage match the manual.

 - todd