Clean up connections #88
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This fixes a bug where if piv-agent exited due to an idle or exit timer then connections to the card were left in pcscd, and then when piv-agent started up again it couldn't (re)open the card.
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Previously
piv-agentwould sometimes get into a state where an exclusive connection to the card blocked accessThis seemed to happen after an idle timeout and restart.
According to the pcsc-lite documentation the context should always be released. So this PR makes sure to do so in
ServeCmd.Run().