[install-guide/f21-branch] No upgrade docs at this time, sorry

[pbokoc]

commit f9a4864641d32c28535b7790a4d27d716e3db30c
Author: Petr Bokoc <pbokoc at redhat.com>
Date:   Mon Dec 8 16:16:20 2014 +0100

    No upgrade docs at this time, sorry

 en-US/Preparing_for_Installation.xml    |    2 +-
 en-US/Upgrading_Your_Current_System.xml |   29 ++++++++++++++++++++++++++---
 2 files changed, 27 insertions(+), 4 deletions(-)
---
diff --git a/en-US/Preparing_for_Installation.xml b/en-US/Preparing_for_Installation.xml
index dce6a1a..bbddba2 100644
--- a/en-US/Preparing_for_Installation.xml
+++ b/en-US/Preparing_for_Installation.xml
@@ -16,7 +16,7 @@
         </para>
         <variablelist>
             <varlistentry>
-                <term>Automatic upgrade using FedUp</term>
+                <term>Automatic upgrade using <application>FedUp</application></term>
                 <listitem>
                     <para>
                         The preferred way to upgrade your system is an automatic upgrade using the <application>FedUp</application> utility. For information on performing an automatic upgrade, see <xref linkend="sect-upgrading-fedora-fedup" />.
diff --git a/en-US/Upgrading_Your_Current_System.xml b/en-US/Upgrading_Your_Current_System.xml
index 3b3ceea..899e6c7 100644
--- a/en-US/Upgrading_Your_Current_System.xml
+++ b/en-US/Upgrading_Your_Current_System.xml
@@ -6,20 +6,43 @@
 <chapter id="chap-upgrading">
     <title>Upgrading Your Current System</title>
     <para>
-        intro text
+        This chapter explains how to upgrade your existing &PRODUCT; installation to the current release. There are two basic ways to do so:
     </para>
+    <variablelist>
+        <varlistentry>
+            <term>Automatic upgrade using <application>FedUp</application></term>
+            <listitem>
+                <para>
+                    The preferred way to upgrade your system is an automatic upgrade using the <application>FedUp</application> utility. For information on performing an automatic upgrade, see <xref linkend="sect-upgrading-fedora-fedup" />.
+                </para>
+            </listitem>
+        </varlistentry>
+        <varlistentry>
+            <term>Manual Reinstallation</term>
+            <listitem>
+                <para>
+                    You can upgrade to the latest version of Fedora manually instead of relying on <application>FedUp</application>. This involves booting the installer as if you were performing a clean installation, letting it detect your existing Fedora system, and overwriting the root partition while preserving data on other partitions and volumes. The same process can also be used to reinstall the system, if you need to. For detailed information, see <xref linkend="sect-upgrading-fedora-manual-reinstall" />.
+                </para>
+            </listitem>
+        </varlistentry>
+    </variablelist>
+    <warning>
+        <para>
+            Always back up your data before performing an upgrade or reinstalling your system, no matter which method you choose.
+        </para>
+    </warning>
 
     <section id="sect-upgrading-fedora-fedup">
         <title>Automatic System Upgrade Using FedUp</title>
         <para>
-            text
+            Unfortunately, we have not written this chapter yet. In the meantime before we fix this, you can follow the instructions at <ulink url="https://fedoraproject.org/wiki/FedUp" />. 
         </para>
     </section>
 
     <section id="sect-upgrading-fedora-manual-reinstall">
         <title>Manual System Upgrade or Reinstallation</title>
         <para>
-            text
+            Unfortunately, we have not written this chapter yet, and there is no dedicated documentation about a manual reinstall on the Wiki, either. In the meantime before we fix this, you can try to start the installation normally (from a boot CD/DVD/USB), select manual partitioning in your installer, and reuse existing partitions instead of destroying them and creating new ones. The instructions at <xref linkend="sect-installation-gui-manual-partitioning" /> should in most cases be easy to adapt for this.
         </para>
     </section>