Please add the ability to add IP addresses to a temporary whitelist with an expiration option. Occasionally, customers may need to troubleshoot issues (e.g., verifying their mail account credentials) after being banned by Fail2Ban. To prevent them from being immediately banned again, we whitelist them temporarily. However, over time, if you forget to remove them, the whitelist grows indefinitely. It would be beneficial if these entries could automatically expire and remove themselves after a set period.