Redirect time changable by users

I've got a request from some users on my board, they want to be able to change the rediredt time by themselves. So why don't have it in the user profile?

The old value in options can be the standard value when they register and then if they like, they can change it.

I like the redirect text becasue it shows the user that something are happening.
This isn't so much work to fix, I will probably make a mod but I think that this function should exist in punbb.