Full details in this doc, tl;dr:

• there are links to 10gen/mongo from the mongodb/mongo repository. One README had dozens of them.
• this is bad for our public image because we release the DB as open-source
• we should find-replace any 10gen/mongo links to refer to the same object in mongodb/mongo. My suggestion is to do this during Copybara syncing, but open to other ways of accomplishing the same task.
• this check/fix needs to exist on an ongoing basis to catch new examples of the wrong link going in.