8.10 Filenames encoding

An encoding form parameter can be used to specify the filename encoding `encoding=xxx'.

• If the form parameter `encoding=utf8' appears in the form string, the filename must be encoded in UTF-8.
• If the form parameter `encoding=8bits' appears in the form string, the filename must be a standard 8bits string.

In the absence of a `encoding=xxx' form parameter, the value UTF-8 is used. This encoding form parameter is only supported on the Windows platform. On the other Operating Systems the runtime is supporting UTF-8 natively.