BUG/MINOR: mux-quic: update session's idle delay before stream creation

This commit is an adaptation from the following patch :
  commit d0de6776826ee18da74e6949752e2f44cba8fdf2
  Author: Willy Tarreau <w@1wt.eu>
  Date:   Fri Feb 4 09:05:37 2022 +0100
  BUG/MINOR: mux-h2: update the session's idle delay before creating the stream

This should fix the incorrect timeouts present in httplog format for
QUIC requests.
diff --git a/include/haproxy/mux_quic.h b/include/haproxy/mux_quic.h
index 72e52f3..dc14277 100644
--- a/include/haproxy/mux_quic.h
+++ b/include/haproxy/mux_quic.h
@@ -92,10 +92,22 @@
 
 static inline struct conn_stream *qc_attach_cs(struct qcs *qcs, struct buffer *buf)
 {
-	if (!cs_new_from_endp(qcs->endp, qcs->qcc->conn->owner, buf))
+	struct session *sess = qcs->qcc->conn->owner;
+
+	/* TODO duplicated from mux_h2 */
+	sess->t_idle = tv_ms_elapsed(&sess->tv_accept, &now) - sess->t_handshake;
+
+	if (!cs_new_from_endp(qcs->endp, sess, buf))
 		return NULL;
 
 	++qcs->qcc->nb_cs;
+
+	/* TODO duplicated from mux_h2 */
+	sess->accept_date = date;
+	sess->tv_accept   = now;
+	sess->t_handshake = 0;
+	sess->t_idle = 0;
+
 	return qcs->endp->cs;
 }