General improvements

templates/openphoto-vhost.conf

 <VirtualHost *:80>
-  Include /etc/apache2/conf-available/global-redirect.conf
+  Include /etc/apache2/{{ apache_conf_dir }}/global-redirect.conf
 
   ServerName  {{openphoto_domain}}
   ServerAlias {{openphoto_aliases|join(' ')}}
@@ -11,7 +11,7 @@
   #RewriteRule ^.*$ http://{{openphoto_domain}} [R,L]
 
   <Directory "/var/www/openphoto/src/html">
-    Include /etc/apache2/conf-available/global-deny.conf
+    Include /etc/apache2/{{ apache_conf_dir }}/global-deny.conf
 
     RewriteEngine on
     RewriteCond %{REQUEST_FILENAME} !-f