integrated proofing corrections from drop 2

- only a minor correction for the Geo Clustering Guide,
  all other English-only books did not require changes

Author: taroth21

xml/geo_ip_i.xml

@@ -48,7 +48,7 @@
 <screen>&prompt.root;<command>dnssec-keygen</command> -a hmac-md5 -b 128 -n USER geo-update</screen>
    <para>
     For more information, see the <command>dnssec-keygen</command> man page or
-    at <link xlink:href="&dsc;/sles-12/html/SLES-all/cha-dns.html#sec-dns-tsig"></link>.
+    <link xlink:href="&dsc;/sles-12/html/SLES-all/cha-dns.html#sec-dns-tsig"></link>.
    </para>
   </listitem>
  </itemizedlist>