+// If your web server supports X-Sendfile (Apache with mod_xsendfile,
+// lighttpd, nginx), you can enable X-Sendfile support for better
+// performance. Presently, only attachment serving when the site is
+// in private mode will use X-Sendfile.
+// $config['site']['X-Sendfile'] = false;
+// You may also need to enable X-Sendfile support for your web server and
+// allow it to access files outside of the web root. For Apache with
+// mod_xsendfile, you can add these to your .htaccess or server config:
+//
+// XSendFile on
+// XSendFileAllowAbove on
+//
+// See http://tn123.ath.cx/mod_xsendfile/ for mod_xsendfile.
+