We should check for dead links in the website
Following on from #19359 (moved), I suspect that similar problems are present in the website.
W3C have a link checker utility that could be run from a Jenkins job.
I have a local Jenkins instance to experiment with this. If it proves to be effective/useful we can consider moving this to jenkins.tpo.
Sebastian noted in IRC that some failures may be temporary and each failure would require individual investigation. In any documentation we should note that we should never automate fixes, even where there are permanent redirects in place (a redirect may occur simply because the content doesn't exist anymore and it just takes you to a home page for instance).