(Feature Request) Add creation and updation timestamp fields to Redirect Model

[Ashish Gupta]

The existing Redirect Model has no field for creation and updation timestamp. Many Django applications use slug based urls, and a redirect is created whenever slug changes. The redirects table will keep expanding and there will be no way to identify or delete the old redirects later, may be after 1 or 2 year. Adding date_created and date_modified fields will help to filter the old redirects and remove them. I feel this should be added in Django core.