poldi: [PATCH] Add option 'killscd'.

[Niibe Yutaka]

NIIBE Yutaka wrote:
>> This doesn't seem to work: I can lock my X session, then unlock it
>> without the pin of the card. I am using xlockmore as the screen
>> locker.
>
> IIUC, a single process of xlockmore keeps running under a user's
> session.  If so, the behaviour can be explained.

Sorry, I was confused.  There are two modes running Poldi: by root
and by normal user.

For screen locker and sudo, Poldi accesses scdaemon through gpg-agent,
thus, the verification status is kept.
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