[master] 5192a6d Document what f stands for

[Federico G. Schwindt]

commit 5192a6d07409968bffa809aa20d2d0293fa0f5a7
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Tue Aug 22 00:05:43 2017 +0100

    Document what f stands for

diff --git a/bin/varnishtest/tests/README b/bin/varnishtest/tests/README
index a48967f..caadbd9 100644
--- a/bin/varnishtest/tests/README
+++ b/bin/varnishtest/tests/README
@@ -19,6 +19,7 @@ Naming scheme
 	id ~ ^c		--> Complex functionality tests
 	id ~ ^d		--> Director VMOD tests
 	id ~ ^e		--> ESI tests
+	id ~ ^f		--> Security related tests
 	id ~ ^g		--> GZIP tests
 	id ~ ^j		--> JAIL tests
 	id ~ ^l		--> VSL tests