Removed possibility of reinstalling Instances

FS#3632 - Adding websites with remote API is broken in 3.0.5.4p3 release.
Missed to commit one file for: FS#3634 - Add option to disable statistics for a website

- Merged language files

- Added warning in the interface when a path for a shelluser is set that is outside of the website docroot.
- Added security settings feature to allow the root user of a server to control most aspects of whet the admin user of the controlpanel is allowed to do in system settings. This is especially useful for managed severs where the ispconfig admin user and the root user of the server are different persons.

- adjusted PHP settings regex to allow |, (, and ) (like in "error_reporting = E_ALL & ~(E_NOTICE | E_DEPRECATED | E_STRICT)")

set webdav sys_groupid onAfterInsert, it didn't work onBeforeInsert. Change server_id and sys_groupid if parent_domain_id changes

- Fixed "no_domain_perm" error when trying to add proxy directives for subdomains or alias domains (nginx).

(nginx still missing)

- Added missing option in centos dovecot.conf file