Request: Auto-redirect from to custom domain

Not sure if I should put this here or feature requests.

If a user goes to one of the old domains and a custom domain is enabled, I would like the option to have it redirected.

Not really sure if this would be a major issue in the long term, but while transitioning to a custom domain it would be helpful for people who have bookmarked the old link or old blogs or documentation that uses the an old link.

I could create a startup query that checks the urlparams and redirects the browser. But redirects are best done on the server.

This would be great as an opt-in feature, thanks for the feedback!