[master] 9fc54436a mark a seemingly redundant test

[Nils Goroll]

commit 9fc54436a3f27c913233c1841f0b20958be22ef4
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon Dec 16 12:36:37 2019 +0100

    mark a seemingly redundant test

diff --git a/bin/varnishtest/tests/v00021.vtc b/bin/varnishtest/tests/v00021.vtc
index 80ef0a93e..fe34b6f14 100644
--- a/bin/varnishtest/tests/v00021.vtc
+++ b/bin/varnishtest/tests/v00021.vtc
@@ -54,6 +54,7 @@ varnish v1 -errvcl {Unused sub foo, defined:} {
 	}
 }
 
+# deliberately testing for name "none"
 varnish v1 -errvcl {Unused sub none, defined:} {
 	backend b { .host = "127.0.0.1"; }