Fixed (partly) FS#2310 - Template switch not working in mailuser module, for dashlets and the login page

FS#2288 - Importer for data from Plesk control panel (first INCOMPLETE version, see bugtracker for status)

- Added "actions" framework in server to replace the functions provided by the core modules
- Moved system update function from remoteactins core module to software update plugin.

- Added PHP-FPM pm settings (pm.max_children, pm.start_servers, pm.min_spare_servers, pm.max_spare_servers) to the "Options" tab of a website.

Implemented: FS#1113 - Force client to use only allowed IPs

- Added SEO redirects (both Apache & nginx) to redirect from non-www website to www website or vice versa.
- Introduced placeholder [scheme] for redirect paths for alias and subdomains; will be replaced with http or https, depending on what the visitor uses.

- Added UFW firewall support.

Updated english languages files
Updated czech languages files

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