Extend validity automatically for actively used shorturls

[m-w]

Currently there's a fixed limit of one year for the validity of the shortened urls. Instead of having to email the webmasters (see Q&A) it would be nice if validity is extended automatically based on the last usage.

This will have several advantages:

• the database is still cleaned up from unused codes,
• no-one needs to worry about the validity period (e.g. QR can be used on prints),
• actively used short urls will not change (e.g. when used in Q&A templates).

I'd like to suggest an automated extension of the validity by one year from the last usage date.

[thenickless]

Thank you for your suggestion!
We will set the limit to unlimited, consider a given date and install a cronjob to clean all links that lead to HTTP 4xx soon.