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Fixed general utf8 encoding problems when data is passed from frontend to server, this fixes also bug FS#1065 - Special characters in autoresponder subject may break the autoresponder 

Merged all language files.

Additionally fixed a bug in web quota calculation.

Implemented: FS#1049 - Allow "Login as" also from the client list as it is allready possible from sysuser list.

Fixed: FS#1047 - php scripts with suexec do not work togetherv with redirects (proposed solution included)

Fixed: FS#1012 - Delete all records (domains, ftp users, etc.) of a client when the client gets deleted.

Added a "under_development" folder in the docs folder. This folder can be used to store incomplete documentation or documentation files that are under devlopment.

Added a global default for the .htaccess allow_override setting.

Changed the characters that are available to be used in the password salt to avoid decoding problems with certain 64Bit Linux systems.