MINOR: h3: Send h3 settings asap

As it is possible to send Application level packets during the handshake,
let's send the h3 settings asaps.
diff --git a/src/h3.c b/src/h3.c
index 550f932..0993713 100644
--- a/src/h3.c
+++ b/src/h3.c
@@ -411,7 +411,7 @@
 		return 0;
 
 	/* Wakeup ->lctrl uni-stream */
-	tasklet_wakeup(h3->lctrl.wait_event.tasklet);
+	h3_control_send(&h3->lctrl, h3);
 
 	return 1;
 }