[master] 6fdbb2c Add introduction and seealso

[Andreas Plesner Jacobsen]

commit 6fdbb2c02c9c93a8dcc5bb14a64158fbe8b8a559
Author: Andreas Plesner Jacobsen <apj at mutt.dk>
Date:   Fri Nov 29 12:52:20 2013 +0100

    Add introduction and seealso

diff --git a/doc/sphinx/reference/vsl.rst b/doc/sphinx/reference/vsl.rst
index e254719..7f79209 100644
--- a/doc/sphinx/reference/vsl.rst
+++ b/doc/sphinx/reference/vsl.rst
@@ -14,7 +14,21 @@ Shared Memory Logging
 :Version: 1.0
 :Manual section: 7
 
+OVERVIEW
+========
+
+This document describes the format and content of all the Varnish shared memory
+logging tags. These tags are used by the varnishlog(1), varnishtop(1), etc.
+logging tools supplied with Varnish.
+
 VSL tags
 ~~~~~~~~
 
 .. include:: ../../../lib/libvarnishapi/vsl-tags.rst
+
+SEE ALSO
+========
+* varnishlog(1)
+* varnishhist(1)
+* varnishncsa(1)
+* varnishtop(1)