Set example cache setting to local directory.

config/vufind/httpd-vufind.conf

@@ -66,7 +66,7 @@ Alias /vufind /usr/local/vufind/public
   # encounter unexpected side effects -- while this directory may be outside of the
   # local settings directory, there should be exactly one separate cache location per
   # local settings directory.
-  #SetEnv VUFIND_CACHE_DIR /usr/local/vufind/cache
+  #SetEnv VUFIND_CACHE_DIR /usr/local/vufind/local/cache
 
   # This line specifies additional Zend Framework 2 modules to load after the standard VuFind module.
   # Multiple modules may be specified separated by commas.  This mechanism can be used to override