new option ssh-add -v to verify if key is loaded into the agent

[Ángel González]

Konrad Bucheli wrote:
> Dear openssh developers
>
> In a shell script I need to verify if a key belonging to a given public
> key file is already loaded into the agent. To achieve this, I added a
> new option -v to ssh-add which does this verification.
I'm not sure -v would be the right letter for that.
-c (check) or -t (test) would be suitable names, but those options are
already taken...