The Shibboleth documentation wiki has moved from a hosted instance of Confluence to the Atlassian cloud.
The new site is located at https://shibboleth.atlassian.net/wiki and we have installed a rule that redirects old page topics to the new site.
See https://shibboleth.atlassian.net/wiki/spaces/DEV/pages/1119354885/Infrastructure+Information for general information on the new system, including the lack of federated/SAML-based access.