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

Fixed a bug that prevented the modification of website settings of a site that the user created.

- Made jailkit programs configurable per linux distribution in the installer.

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

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