in src/transport/xqc_send_queue.c [579:587]
void xqc_send_queue_drop_initial_packets(xqc_connection_t *conn)
{
/* initial packets are send on conn_initial_path */
xqc_send_ctl_t *send_ctl = conn->conn_initial_path->path_send_ctl;
xqc_send_queue_t *send_queue = conn->conn_send_queue;
xqc_send_queue_drop_packets_with_type(send_ctl, send_queue, XQC_PTYPE_INIT);
xqc_send_ctl_on_pns_discard(send_ctl, XQC_PNS_INIT);
conn->max_acked_po_size = XQC_QUIC_MIN_MSS;
}