Fix for PHP/Apache2.4 not to force UTF-8 encoding
In fact it is PHP, that is sending extra header, making browser think, that page is in UTF8. That is wrong. To disable this edit php.in (/usr/local/lib/php.ini), find the following line and set empty value. If line is commented – you should uncomment it!
default_charset = ""
Of course don’t forget to restart apache and php, if it runs as through FPM manager.