Coming out from the idea https://planet4.greenpeace.org/idea/integrate-tool-to-spot-broken-links/ we should recommend the best way to Spot broken links within a P4 instance.

There are multiple solutions (mySQL query? Plugin?) - whichever we choose has to function with (or even perform) the "Search and Replace" solution - see ticket PLANET-5411

Potential plugin --> https://wordpress.org/plugins/broken-link-checker/ or 3rd party solution (used by GP CH) --> https://www.screamingfrog.co.uk/seo-spider/

Site Admins and Editors should be able to use this feature.