[system-administrators-guide] Update to Network Interfaces: adding /etc/hostname

[stephenw]

commit acd71eb37843d986f0bdf0ba63e134ca6f03fc77
Author: Stephen Wadeley <swadeley at redhat.com>
Date:   Mon Mar 11 17:22:39 2013 +0100

    Update to Network Interfaces: adding /etc/hostname
    
    As of Fedora 18, /etc/hostname is now used instead of the HOSTNAME
    variable in /etc/sysconfig/network

 en-US/Network_Interfaces.xml |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/en-US/Network_Interfaces.xml b/en-US/Network_Interfaces.xml
index 4ee65c7..4066eb3 100644
--- a/en-US/Network_Interfaces.xml
+++ b/en-US/Network_Interfaces.xml
@@ -68,6 +68,16 @@
       </varlistentry>
       <varlistentry>
         <term>
+        <filename>/etc/hostname</filename>
+        </term>
+        <listitem>
+          <para><!--http://docs.fedoraproject.org/en-US/Fedora/18/html-single/Release_Notes/#idm84870144-->
+            There are three separate classes of hostnames in use on a given system. The pretty hostname is the high level hostname often presented to users by their desktop environment or shell. The static hostname is used by the kernel at boot, and is usually the system's fully qualified domain name. A system may also have a transient hostname assigned by a dhcp server. hostnamectl is provided for administering these hostnames. For more information on hostnames, see man  <emphasis role="bold">hostname</emphasis> and man  <emphasis role="bold">hostnamectl</emphasis>.
+            </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>
           <filename>/etc/resolv.conf</filename>
         </term>
         <listitem>