Panic at main (http 521)

[Chaz6]

After running for a while the certstream program failed with the following output:-

thread 'main' panicked at 'Failed to connect: Http(Response { status: 521, version: HTTP/1.1, headers: {"date": "Sun, 09 Oct 2022 18:28:01 GMT", "content-type": "text/html", "transfer-encoding": "chunked", "connection": "keep-alive", "cache-control": "no-store, no-cache", "report-to": "{\"endpoints\":[{\"url\":\"https:\/\/a.nel.cloudflare.com\/report\/v3?s=45%2BwYJkZC5m3mBQfU8uGv%2FguD%2FpKGNy6MZ4MSuBAJwTH3yxa3DPCiIi38pIXmmYiT%2FV9E9kef4jiy46l4G4b3P31DGeINQmKZdCvxgLXtdCuihUJT8ZNUJx0XKFVEDFSa3ZC3JNFOK0nqMr6DfAhdtoKoLs%3D\"}],\"group\":\"cf-nel\",\"max_age\":604800}", "nel": "{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}", "server": "cloudflare", "cf-ray": "75792c774e017774-LHR", "alt-svc": "h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400"}, body: None })', src/certstream/main.rs:75:71