Typo fix. Thanks William Harrington

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11229 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/systemd.xml

@@ -180,7 +180,7 @@ EOF</userinput></screen>
       <varlistentry>
         <term><parameter>--with-default-dnssec=no</parameter></term>
         <listitem>
-          <para>This switch turns off the experimental DNSSEC suport.</para>
+          <para>This switch turns off the experimental DNSSEC support.</para>
         </listitem>
       </varlistentry>