[html-formfu] .conf unicode change

[Carl Franks]

I've discovered that .conf files weren't being utf8-decoded when they
were being read - this means that any application trying to handle
utf8 correctly would have problems.

The methods load_config_file() and load_config_filestem() now
explicitly set the Config::Any option
    driver_args => {
        General => { -UTF8 => 1 }
    }

This means Config::General files will now work correctly.

Carl