Redirects extension?

Sometimes things change.

We all know this is a [Bad Thing](http://www.w3.org/Provider/Style/URI.html), but face it, these things happen in the Real World.

I'm wondering if it would be useful to have a simple CKAN extension,that when installed and enabled, lets admins of an instance/organization set up a redirection from OLD to NEW, with a choice/set of HTTP Status codes (and actions), 301, 303, 308, 410, 451, like Wordpress provide(s|d).

The extension should check OLD no longer exists, and NEW does.

There could be an impact on ckanext-qa, but there may not.

Start by reviewing the proposed CKAN extension behavior and how CKAN represents existing resources or URLs. Define how admins and organizations configure OLD-to-NEW redirects, which HTTP status codes and actions are supported, and how OLD/NEW validation works. Check whether ckanext-qa is affected; the issue is done only when the scope and behavior are agreed.

Written by the indexing model from the issue text.