> To me, the target of that language is software that generically treats > protocol elements beginning with "x-" in a fundamentally different > way, without knowledge of its semantics. That is broken, causes real > harm, and I have seen it deployed. clue bat please? is there any general semantic to X-? randy _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf