REGTEST: fix the race conditions in digest.vtc

A "Connection: close" header is added to responses to avoid any connection
reuse. This should avoid any "HTTP header incomplete" errors.

(cherry picked from commit 1858c244c4b703ab5713b30c9a4e502c5444a4f3)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit d40737e2cf0ddeac4711bf27d798714b573f2605)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 387aa39763cee71036d3a5fe1655bf57a4ed8f26)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 0cf6bfc7c5058f93d5ba5b8ce053d021c075ce61)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/reg-tests/converter/digest.vtc b/reg-tests/converter/digest.vtc
index a14f1cc..511daca 100644
--- a/reg-tests/converter/digest.vtc
+++ b/reg-tests/converter/digest.vtc
@@ -7,7 +7,7 @@
 
 server s1 {
 	rxreq
-	txresp
+	txresp -hdr "Connection: close"
 } -repeat 2 -start
 
 haproxy h1 -conf {