If I use nginx to assign 127.0.0.1:8083 with one of named VirtualHost - I have error when login by user (Browser redirect me to self domain name with 8083 port, which is already closed).
Also this fix doesn't break anything on default use.
Added automatic language detection based on HTTP_ACCEPT_LANGUAGE
header. New function _translate, that translates string to required
language.
New file: setlang.php?l=language_code - sets session language.