Fixed: FS#1900 - Check if the membership of the web user in the sshusers group affects pure-ftpd virtualchroot

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

- Set error reporting level in app inc.

- Fixed a problem with german umlauts in monitor.
- Added code to update.php and autoupdate.php that checks the mysql root password before the update starts.
- Fixed: FS#1848 - changing password of ssh user >>> rights in webXX are changed

- Fixed a warning in apache plugin.

- Make Apache/nginx restart after a site was deleted.
- Make sure the correct symlinks are deleted from the sites-enabled directory when a site is deleted (100-example.com.vhost, 900-example.com.vhost, or example.com.vhost).

- 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