
HTTP Fetch Metadata Request Headers [1][2] are used to detect bot requests. Bots with invalid *Fetch Metadata* will be redirected to the intro (`index`) page. [1] https://www.w3.org/TR/fetch-metadata/ [2] https://developer.mozilla.org/en-US/docs/Glossary/Fetch_metadata_request_header Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>