--http2-prior-knowledge
(HTTP) Issue a non-TLS HTTP requests using HTTP/2 directly without HTTP/1.1 Upgrade. It requires prior knowledge that the server supports HTTP/2 straight away. HTTPS requests still do HTTP/2 the standard way with negotiated protocol version in the TLS handshake.
https://curl.se/docs/manpage.html#--http2-prior-knowledge
current:
after: