Update kdump steps (#256)

jsc#DOCTEAM-358
bsc#1188396

xml/ha_fencing.xml

@@ -458,19 +458,19 @@ commit</screen>
      <literal>KDUMP_POSTSCRIPT</literal> to send a notification to all nodes
      when the Kdump process is finished. For example:
     </para>
-<screen>/usr/lib/fence_kdump_send -i <replaceable>INTERVAL</replaceable> -p <replaceable>PORT</replaceable> -c 1 &node1; &node2; &node3; [...]</screen>
+<screen>KDUMP_POSTSCRIPT="/usr/lib/fence_kdump_send -i <replaceable>INTERVAL</replaceable> -p <replaceable>PORT</replaceable> -c 1 &node1; &node2; &node3;"</screen>
     <para>
      The node that does a Kdump will restart automatically after Kdump has
      finished.
     </para>
    </step>
    <step>
     <para>
-     Write a new <filename>initrd</filename> to include the library <literal>fence_kdump_send</literal>
-     with network enabled. Use the <option>-f</option> option to overwrite
-     the existing file, so the new file will be used for the next boot process:
+     Run either <command>systemctl restart kdump.service</command> or <command>mkdumprd</command>.
+     Either of these commands will detect that <filename>/etc/sysconfig/kdump</filename>
+     was modified, and will regenerate the <filename>initrd</filename> to include the
+     library <literal>fence_kdump_send</literal> with network enabled.
     </para>
-<screen>&prompt.root;dracut -f -a kdump</screen>
    </step>
    <step>
     <para>