https://torrentfreak.com/error-451-theres-now-an-http-code-for-internet-censorship-151222/Increasingly, Internet providers are being instructed by courts to block access to websites. This measure is often applied against copyright infringing sites, but not always with a proper explanation. The Internet Engineering Task Force (IETF) just approved a special HTTP status code for these type of legal demands, Error 451.
well... now browsers.. and select addons.. will have a quicker way re-routing the request...
