Bug 618844: Make clear that the Apache module must be enabled in release notes

template/en/default/pages/release-notes.html.tmpl

@@ -309,13 +309,13 @@
   [%+ terms.Bugzilla %] would have to clear their cache in order to get
   the updated files. Now, if you are using Apache as your webserver and
   you have the <a href="#v40_req_apache">optional Apache modules</a>
-  installed, users will automatically get every new version of
+  installed and enabled, users will automatically get every new version of
   [%+ terms.Bugzilla %]'s Javascript and CSS without having to clear
   their caches.</p>
 
 <p>This feature also gives a slight performance speedup to
   [%+ terms.Bugzilla %] in some cases, and so we recommend that all
-  administrators install the optional Apache modules if possible.</p>
+  administrators install and enable the optional Apache modules if possible.</p>
 
 <h3 id="v40_feat_hooks">Many New Hooks</h3>