Merged revisions 3049-3051,3053-3054,3058,3070,3074-3077,3082,3086-3088,3091-3092,3094-3095 from stable branch.

- Fastcgi: delete .php-fcgi-starter directory if another PHP mode is used.

- Improved support for multiple PHP versions. Additional PHP versions have now their own form and database table.

- Fixed UTF-8 support in email function.

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

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.

default favicon.ico which is blank, a simple 
.htaccess, and a simple robots.txt.  This will 
also reduce 404s on the whole server