restructure section sec.ha.docupdates.sle12_sp1_maint_3

- remove varlistentry for a single chapter
- integrate respective entry to 'Bugfixes and Doc Comments' section instead

xml/ha_docupdates.xml

@@ -78,21 +78,15 @@ toms 2014-08-12:
   <title>December 2016 (Maintenance Update of &productname; 12 SP1)</title>
   <variablelist>
    <!--list of general issues that apply to all books-->
-   <varlistentry xml:id="vle.ha.docupdates.sle12_sp1_maint_3">
-    <term><xref linkend="cha.conf.hawk2"/></term>
+   <varlistentry>
+    <term>Bugfixes and Doc Comments</term>
     <listitem>
      <itemizedlist>
       <listitem>
-       <para>Rephrased note about &hawk; and &hawk;2 (doc comment #30369).
+       <para>In <xref linkend="cha.conf.hawk2"/>, rephrased note about &hawk;
+        and &hawk;2 (doc comment #30369).
        </para>
       </listitem>
-     </itemizedlist>
-    </listitem>
-   </varlistentry>
-   <varlistentry>
-    <term>Bugfixes</term>
-    <listitem>
-     <itemizedlist>
       <listitem>
        <para>Corrected a command in <xref linkend="sec.ha.drbd.configure.init"/>
          (<link xlink:href="https://bugzilla.suse.com/show_bug.cgi?id=990416"