[doc] rearranges Settings & Engines docs for better readability

We have built up detailed documentation of the *settings* and the *engines* over
the past few years.  However, this documentation was still spread over various
chapters and was difficult to navigate in its entirety.

This patch rearranges the Settings & Engines documentation for better
readability.

To review new ordered docs::

   make docs.clean docs.live

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/user/index.rst b/docs/user/index.rst
index 4603b4716..705fd3f9e 100644
--- a/docs/user/index.rst
+++ b/docs/user/index.rst
@@ -2,7 +2,7 @@
 User information
 ================
 
-.. contents:: Contents
+.. contents::
    :depth: 3
    :local:
    :backlinks: entry