decrement by two, since at this size Payload Length would be a 2-by…

…te field

draft-ietf-quic-tls.md

@@ -557,7 +557,7 @@ older than 1.3 is negotiated.
 
 QUIC requires that the initial handshake packet from a client fit within the
 payload of a single packet.  The size limits on QUIC packets mean that a record
-containing a ClientHello needs to fit within 1130 octets, though endpoints can
+containing a ClientHello needs to fit within 1129 octets, though endpoints can
 reduce the size of their connection ID to increase by up to 22 octets.
 
 A TLS ClientHello can fit within this limit with ample space remaining.