We should run a tool that recursively follows all the links and reports which ones are broken. And then correct or remove them.

For example, there are many links pointing to docs.pivotal.io, such as https://docs.pivotal.io/spring-cloud-services/1-5/common/circuit-breaker/, which today redirects to the generic Broadcom page at https://techdocs.broadcom.com/us/en/vmware-tanzu.html.