[4.1] 3912645 fix the std.getenv example

[PÃ¥l Hermunn Johansen]

commit 3912645048b575242a0c655ccf53ca0894d931db
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Thu Mar 2 09:55:50 2017 +0100

    fix the std.getenv example

diff --git a/lib/libvmod_std/vmod.vcc b/lib/libvmod_std/vmod.vcc
index e7f1d6f..3c058d0 100644
--- a/lib/libvmod_std/vmod.vcc
+++ b/lib/libvmod_std/vmod.vcc
@@ -286,7 +286,7 @@ Description
 
 	See getenv(3)
 Example
-	| set req.http.My-Env = getenv("MY_ENV");
+	| set req.http.My-Env = std.getenv("MY_ENV");
 
 SEE ALSO
 ========