Fixed regex in hardening Cacti doc

Author: roman-vynar

docs/cacti/hardening-cacti-setup.rst

@@ -31,7 +31,7 @@ We strongly recommend to close any access from the web for these additional dire
 
 Here is an example of httpd configuration that can harden your setup (goes to ``/etc/httpd/conf.d/cacti.conf``)::
 
-   <Directory ~ "/usr/share/cacti/(log|rra|scripts|cli|\.ssh)?(/.*\.(cnf|boto))?">
+   <Directory ~ "/usr/share/cacti/(log|rra|scripts|cli|\.ssh|\.boto|.*\.cnf)">
 	<IfModule mod_rewrite.c>
 		Redirect 404 /
 	</IfModule>