Reserving the clear ALPN Protocol ID
Lucas Pardue, Anthony Ramine · 2021
HTTP Alternative Services (Alt-Svc) are identified by a tuple of Application-Protocol Layer Negotiation (ALPN) protocol identifier, a host and a port. The wire format for Alt-Svc is defined in ABNF and encodes this tuple or the keyword clear, which has a special meaning. This memo reserves the ALPN protocol identifier clear to reduce the chances of accidental aliasing with the clear keyword.