[dev] Browser and 'utf' feature

[François Helly]

Hi all

I tested the framework with Safari :

_SERVER["HTTP_USER_AGENT"]
Mozilla/5.0 (Macintosh; U; PPC Mac OS X; fr-fr) AppleWebKit/125.5.5 
(KHTML, like Gecko) Safari/125.12

_SERVER["HTTP_ACCEPT"]
*/*

No _SERVER["HTTP_ACCEPT_CHARSET"]

so the 'utf' feature isn't applied at all
to this user agent (it does support utf)

maybe we have to hardcode it in Browser::match() ?

François