[4.0] 2aa3546 s/have/has/

[Dridi Boukelmoune]

commit 2aa35465df53fa95f113e57b471b3cff8f496474
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Fri Jun 19 16:14:03 2015 +0200

    s/have/has/

diff --git a/doc/changes.rst b/doc/changes.rst
index d92ce53..2ecd3af 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -7,7 +7,7 @@ Changes from 4.0.3 to (unreleased)
   and has been retired.
 * Requests with multiple Content-Length headers are now dropped.
 * Python is now a dependency of varnish-libs-devel on Redhat systems. (vmodtool.py)
-* varnishreplay documentation have been retired.
+* varnishreplay documentation has been retired.
 
 Bugs fixed
 ----------