If you add/remove server IPs the file `/etc/apache2/sites-available/ispconfig.conf` gets recreated and it is missing the alias for Let's Encrypt ACME challenges. Copying over the current install template fixes that. 

Maybe one could remove this template duplication completely by using `server/conf/apache_ispconfig.conf.master` in the install process?

The `Header set Content-Type "text/plain"` was only in `server/conf/apache_ispconfig.conf.master` and not in `install/tpl/apache_ispconfig.conf.master` – is it necessary?

Updated apache_ispconfig.conf.master to allow access to phpmyadmin and squirrelmail on opensuse 13.1.

Changed: apps vhost is now a template (for apache version)
Changed: template if tags can now be of format 'version' to make version comparisons (e.g. 2.12 > 2.2 !)
Changed: New apache 2.4 syntax for deny from all (-> Require all denied) etc.

Updated apacheChanged apache_ispconfig.conf.master template to allow access to phpmyadmin and squirrelmail in redhat based distributions.

Added: interface module web traffic statistics
Fixed: mail_traffic is now reported to master server instead of local
Fixed: GRANTs for slave server database user on master database

- Added deny directives to prevent direct access to the /var/www/clients and /var/www/domain.tld directories.

Put vlogger log directives in separate apache config file so they are available for the websites even if the controlpanel is not installed on the server.