Redmine

Hi

in the context of #38511 I noticed that even after one week my unactivated account @henk_test was not deleted but still waited for me to click the confirmation link.

I see a similar issue with my own redmine instance where registrations require administrator approval: I have to delete a lot of accounts registered by bots.

It would be great to have redmine expire unconfirmed/unactivated accounts after a configurable amount of time.