Serve robots.txt disallowing all robots This overrides any robots.txt file in the proxied gemini capsule, on the basis that this is intended for gemini robots (which can be expected to follow the robots.txt companion spec) rather than web robots. The main purpose though for disallowing web robots is to prevent them from crawling the proxied cross-site geminispace under /x/, since web robots won't know even to read the robots.txt files for other capsules proxied this way.