[7.4] 79bec7890 vtc: Coverage for h2 empty header in t02023

[Dridi Boukelmoune]

commit 79bec78901da20fadd11d5287d0e9ae16c3b6ed1
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Thu Sep 14 12:59:21 2023 +0200

    vtc: Coverage for h2 empty header in t02023

diff --git a/bin/varnishtest/tests/t02023.vtc b/bin/varnishtest/tests/t02023.vtc
index 388f3a70a..13c4cb445 100644
--- a/bin/varnishtest/tests/t02023.vtc
+++ b/bin/varnishtest/tests/t02023.vtc
@@ -1,4 +1,4 @@
-varnishtest "Empty pseudo-headers"
+varnishtest "Empty and invalid headers"
 
 server s1 {
 	rxreq
@@ -50,6 +50,14 @@ client c1 {
 	} -run
 } -run
 
+client c1 {
+	stream 1 {
+		txreq -hdr "empty" ""
+		rxresp
+		expect resp.status == 200
+	} -run
+} -run
+
 varnish v1 -vsl_catchup
 
 client c1 {