Add possibility to mark as error specific external URLs / domains or patterns
There are several use cases where it is necessary to find all links to a certain domain or url pattern. Use cases include:
- Find all External Links that are indeed pointing to the site itself in order to replace them for internal links
- Find all External Links pointing to a former installation on an external system preparing to shut down.
- Find links to certain sites you do not want to link for legal reasons (some media doesn't want to be deeplinked) or because they have been found to have unreliable information or the domain has been sold or such