fix file location for configure-index.gz in apt.conf(5)

Closes: #711921

debian/changelog

@@ -15,6 +15,7 @@ apt (0.9.8.3) UNRELEASED; urgency=low
   * OpenDescriptor should autoclose fd always on error (Closes: #704608)
   * fail in CopyFile if the FileFds have error flag set
   * ensure state-dir exists before coyping cdrom files
+  * fix file location for configure-index.gz in apt.conf(5) (Closes: #711921)
 
  -- David Kalnischkies <kalnischkies@gmail.com>  Sun, 09 Jun 2013 15:06:24 +0200
 

doc/apt.conf.5.xml

@@ -98,8 +98,7 @@ APT {
 DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt";};
 </programlisting></informalexample>
 
-   <para>In general the sample configuration file in 
-   <filename>&docdir;examples/apt.conf</filename> &configureindex;
+   <para>In general the sample configuration file &configureindex;
    is a good guide for how it should look.</para>
 
    <para>Case is not significant in names of configuration items, so in the