[4.1] ed88811 Forgotten parameter in previous commit

[Federico G. Schwindt]

commit ed888115b2182d422c1d7240f4f2d82a7eb4dd2c
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Tue Jul 28 23:56:58 2015 +0100

    Forgotten parameter in previous commit

diff --git a/doc/sphinx/reference/varnishd.rst b/doc/sphinx/reference/varnishd.rst
index 33d60f6..378daff 100644
--- a/doc/sphinx/reference/varnishd.rst
+++ b/doc/sphinx/reference/varnishd.rst
@@ -150,7 +150,7 @@ OPTIONS
 
   Display the version number and exit.
 
--W
+-W waiter
 
   Specifies the waiter type to use.