Merge the code from develop to master for 2.4.0Enea_NFV_Access_2.4.0hotfix_EDGESC-6feature_CPDX-3546EE240_HotFix1

Change-Id: Ibc844e001b7d75125d6006fa5333cc65bbf5afa4

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+<?xml version="1.0" encoding="UTF-8"?>
+<chapter id="intro">
+  <title>Introduction</title>
+
+  <para>This document describes several example use-cases concerning uCPE
+  configuration, onboarding and instantiation of certain VNFs, VNF chaining,
+  etc.</para>
+
+  <para>Before running any example use-case make sure the uCPE device(s) have
+  been added to the Enea Edge Management application and placed on the map.
+  For detailed information on how to add a device to the Enea Edge Management
+  application, how to configure the network interfaces to use DPDK,
+  PCI-passthrough or SR-IOV drivers, or VNF configuration, please refer to the
+  <xi:include href="../../s_docbuild/olinkdb/pardoc-common.xml"
+  xmlns:xi="http://www.w3.org/2001/XInclude"
+  xpointer="element(book_enea_edge_getting_started/1)" /> Manual.</para>
+
+  <note>
+    <para>Examples presented in this document use 3rd-party VNFs, which are
+    not provided by Enea. To procure and use these VNF image files and license
+    files, please contact the VNF provider.</para>
+
+    <para>Request the VNF prerequisites from the VNF vendors, or alternatively
+    obtain the prerequisites based on instructions from each VNF vendor
+    respectively.</para>
+  </note>
+</chapter>
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