PhpBB3.1/RFC/Automatic UTF-8 Normalization

Currently any call to request_var with multibyte characters requires a manual call to utf8_normalize_nfc. This, even though you have to tell request_var that the content can contain UTF-8 characters. This makes the whole API more complicated than needed. By doing normalization from within request_var this can be simplified.

Usage
The old syntax for reading UTF-8 data from the request parameters was:

$input = utf8_normalize_nfc(request_var('input', '', true));

The new API is:

$input = request_var('input', '', true);

Implementation
Because UTF-8 normalization is idempotent (http://unicode.org/reports/tr15/#Design_Goals), the change is fully backwards-compatible.

Normalization is applied from within request_var, which means it doesn't have to be explicitly called from outside anymore.