Force relative redirect links (wse_preview)

Moving to its own component :)

Thanks Andrei, I pushed another commit enabling validation on the path.

Cool, that means we don't need the custom validation anymore. Pushed a commit to remove it, and merged the MR to 2.0.x, thanks!

This was not working as intended: I got errors when testing this with legacy redirects containing absolute URLs. The attached PR just turns the redirect into a relative URL.

Sorry, minor cleanup.

Thanks, I tested this and it works as expected, no errors :)

Committed the followup, thanks!

Automatically closed - issue fixed for 2 weeks with no activity.