Revoke certificates, Certificate Revoke Lists (CRL)

[arbdevml]

Hello, first of all very big thank you for this project.

@wushilin, what do you think about revoking certificates instead of deleting
or a new feature to revoke certificates and download Certificate Revoke Lists (CRL)?

Thank you for your answer.

[wushilin]

this should not be hard to implement, let me look into it.