[6.0] ee7d2d43e polish

[Dridi Boukelmoune]

commit ee7d2d43eb2e5f74df058a5cde4eda9df68d2162
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Wed Sep 12 10:41:59 2018 +0200

    polish

diff --git a/doc/sphinx/reference/vmod.rst b/doc/sphinx/reference/vmod.rst
index e91b87db1..df6f5c7d9 100644
--- a/doc/sphinx/reference/vmod.rst
+++ b/doc/sphinx/reference/vmod.rst
@@ -46,7 +46,7 @@ The vmod.vcc file
 The interface between your VMOD and the VCL compiler ("VCC") and the
 VCL runtime ("VRT") is defined in the vmod.vcc file which a python
 script called "vmodtool.py" turns into thaumaturgically challenged C
-data structures that does all the hard work.
+data structures that do all the hard work.
 
 The std VMODs vmod.vcc file looks somewhat like this::