- Add config to clear php handler in apps vhost.

- Added options to use a mounted backup directory. This allows for remote backups, e.g. vis sshfs to a backup server. The backup script checks if the backup directory is mounted, and if not, tries to mount it.

Removed workarounds

Fixed login as

- Added fields to client, reseller and website to show when a record was added and by which user

- nginx: added {DOCROOT} and {FASTCGIPASS} placeholders to directive snippets and nginx Directives fields.

- Display server name in all web domains select fields so that you know which domain from which server you select.

- Websites and Vhostsubdomains: When editing a web, show quota and traffic errors to client/reseller only if he has changed those values; don't show errors for unchanged values.