An extension of HTCPCP protocol was published this week on IETF website. This new protocol is published in RFC 7168: "The Hyper Text Coffee Pot Control Protocol for Tea Appliances Efflux" (HTCPCP-TEA).
This New RFC is available here: http://tools.ietf.org/html/rfc7168
The purpose of this extension is to allow service of tea. I do not approve this update at all. For me it is a sacrilege... especially in the morning.
The teapot at www.error418.net is not yet compatible with the new protocol HTCPCP-TEA and will continue to issue 418 error.
This new protocol can nevertheless be useful at five o'clock. An update of the teapot to make it compatible with the new protocol may be considered in the future.
