On the How to Create Virtual Servers page, the “Top-level servers”, “Sub-servers”, and “Aliases” links in the blue box near the top of the page are broken.
Edit: Looks like all the “Getting Started” tutorials used to live at docs/step-by-step-tutorial, but then got moved to docs/getting-started, but those three links weren’t updated. You might do a global search for any other links in the docs broken in the same way.