Show retry count (< 3) in pinentry

[robinkrahl]

We only show a warning in the pinentry dialog directly after the user entered a wrong passphrase. gnupg on the other hand always shows the retry count if it is less than 3. Would it make sense to do that too? It would require an additional command to query the retry count but I think it could be useful.

[d-e-s-o]

Yep, I agree that it would be useful.