QUIC: application init() callback. It's called after handshake completion or prior to the first early data stream creation. The callback should initialize application-level data before creating streams. HTTP/3 callback implementation sets keepalive timer and sends SETTINGS. Also, this allows to limit max handshake time in ngx_http_v3_init_stream().

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


cat << END >> $NGX_AUTO_HEADERS_H

#ifndef $have
#define $have  1
#endif

END