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

- Added escapeshellcmd to some paths in nginx_plugin.inc.php.

- 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.

- Fixed FS#1745.

fixed #681 - removed all onblur, checked onchange for function and removed it in filter panels. Added jquery keypress (event 13 -> enter) and tested it in different browsers

http://lathama.net/Recursively_deleting_Microsoft_end_of_line_characters

- Added UFW firewall support.