If a link leads a non-existent site, e.g https://asdfadsfadsfadsf.com, no status code gets associated with the link. This means that a view which filters by status code will not show these links.
This is an issue because without filtering by status code, the linkchecker view will simply return all linkchecker entities, including entities with 2xx and 3xx status codes. This is not helpful as I, and I assume most users need a view which will show links which only return a 4xx or greater status code.
Create a setting in the admin form to optionally clean the linkchecker entities of status codes between two values. For example: 0 and 399. Use this with database API to then remove these values on a button click. After doing so, the view no longer needs to filter by status code to only show broken links.
Needs review
2.0
Code