Source of HTTPDatagramPING

TITLE:HTTP Datagram PING 
[[HTTP/3]] > [[HTTPDatagramPING]]

- https://www.ietf.org/archive/id/draft-schwartz-masque-h3-datagram-ping-00.html

*. [#u855a360]

- HTTP Datagram PING の拡張仕様についてのメモ
--  https://asnokaze.hatenablog.com/entry/2021/09/27/011530