[4.0] 1199126 Add compression to performance

[Per Buer]

commit 1199126de3127df1fd46b6c2615f02f89feca3d8
Author: Per Buer <perbu at varnish-software.com>
Date:   Thu Feb 6 14:29:24 2014 +0100

    Add compression to performance

diff --git a/doc/sphinx/users-guide/operation.rst b/doc/sphinx/users-guide/operation.rst
index ed6f5e0..76fbf5d 100644
--- a/doc/sphinx/users-guide/operation.rst
+++ b/doc/sphinx/users-guide/operation.rst
@@ -6,8 +6,6 @@ XXX: These are chapters which need to find a new home in the other sections.
 .. toctree::
    :maxdepth: 2
 
-   purging
-   compression
    esi
    vary
    cookies
diff --git a/doc/sphinx/users-guide/performance.rst b/doc/sphinx/users-guide/performance.rst
index 1dbb991..baf9c75 100644
--- a/doc/sphinx/users-guide/performance.rst
+++ b/doc/sphinx/users-guide/performance.rst
@@ -6,7 +6,7 @@ Varnish and Website Performance
 This section is about tuning the performance of your Varnish server,
 and about tuning the performance of your website using Varnish.
 
-The section is split into two. One deals with the various tools and
+The section is split in three sections. One deals with the various tools and
 functions of Varnish that you should be aware of and the other focuses
 on the how to purge content out of your cache. Purging of content is
 essential in a performance context because it allows you to extend the
@@ -14,8 +14,14 @@ essential in a performance context because it allows you to extend the
 Varnish to keep the content in cache longer, meaning Varnish will make
 send fewer requests to your relativly slow backend.
 
+The final section deals with compression of web content. Varnish can
+gzip content when fetching it from the backend and then deliver
+compressed. This will reduce the time it takes to download the content
+thereby increasing the performance of your website.
+
 .. toctree::
    :maxdepth: 2
 
    increasing-your-hitrate
    purging
+   compression