added link for 2.4.2 to archived install guides

git-svn-id: https://svn.apache.org/repos/asf/vcl/site/trunk@1820681 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/content/docs/installation.mdtext b/content/docs/installation.mdtext
index 443b98a..f2cb0b3 100644
--- a/content/docs/installation.mdtext
+++ b/content/docs/installation.mdtext
@@ -45,6 +45,7 @@
 <BR>
 Archived Install guides:
 
+[VCL 2.4.2 Installation Guide](/docs/VCL242InstallGuide.html)<br>
 [VCL 2.3.2 Installation Guide](/docs/VCL232InstallGuide.html)<br>
 [VCL 2.3.1 Installation Guide](/docs/VCL231InstallGuide.html)<br>
 [VCL 2.3 Installation Guide](/docs/VCL23Installation.html)