Add option "set_folder_permissions_on_update" in server config to configure if folder permissions should be forced on web update.

Splitted the remote function permission array for the remote user form into separate config files. The new remote.conf.php files are located in the lib folder of the modules.

- Added SNI config field in sysetm > server config > web.

- Removed ufw firewall tab.

- Fixed FS#1745.

- Added a new IP validator to the tform library which validates IPv4 and IPv6 addresses.

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http://bugtracker.ispconfig.org/index.php?do=details&task_id=1689

Added a example file for adding a VM with the remote API

- Added UFW firewall support.

First Version of the Server-Config of the new rescue module (module is not implemented yet, only the Config-interface)

Using these variables in welcome email from admin, when mailbox is created.

Fixed: FS#1275 - Port 8081 (apps vhost) should be included in the default open TCP ports in the firewall 

Removing white space in the remote_user.tform.php file while calling the client_template_get_by_user function. Reported by ispcomm

- Fixed a formatting problem with suphp.conf and newer suphp versions.