||[!!!]: disable "Bootup::filterRequestUri()" && "Bootup::filterRequestInputs()" by default
Since version 5.4.26 this library will NOT force "UTF-8" by "bootstrap.php" anymore.
If you need to enable this behavior you can define "PORTABLE_UTF8__ENABLE_AUTO_FILTER", before requiring the autoloader.
Before version 5.4.26 this behavior was enabled by default and you could disable it via "PORTABLE_UTF8__DISABLE_AUTO_FILTER", but the code had potential security vulnerabilities via injecting code while redirecting via ```header('Location ...```.
This is the reason I decided to add this BC in a bug fix release, so that everybody using the current version will receive the security-fix.