stateless reset

RU: stateless reset

A QUIC mechanism (RFC 9000 §10.3) that lets an endpoint terminate a connection even after losing its state. The endpoint sends a packet containing a 16-byte stateless reset token — a value derived from a static secret and the connection ID — which the peer recognises and treats as a connection close. Without it, a rebooted server could not signal that old connection IDs are invalid, leaving the peer retrying indefinitely.