Support utf-8 for filenames inside the zip

[vtexier]

My filepathes inside the zip are in UTF-8.

folder31/subtitlehéhà32.stl

But when I download and open the zip, I got this :

• on Linux :

subtitlehéhà32.stl

• on Windows

subtitleh+®h+á32.stl

The problem seems to be solved in the zipStream-php project:

rlatkn/ZipStream-PHP@55b9e39

Looking into the code I see that the ZipStreamedResponseBundle
already use the good flag in the general purpose flag

    // tell us that Data Descriptor MUST be send,
    // because crc32&lengths in "local file header" are set to 0
    const ZIP_GENERAL_PURPOSE_DATA_DESCRIPTOR = "\x08\x00";

[edit]
I was mistaken by your custom flag.
I found the solution.
To get correct utf-8 in filepathes, need to set bit 11 in general purpose flags:

    // tell us that Data Descriptor MUST be send,
    // because crc32&lengths in "local file header" are set to 0
    // Encoding must be in UTF-8
    const ZIP_GENERAL_PURPOSE_DATA_DESCRIPTOR = "\x08\x08";

This will force to use UTF-8 in filepathes, so maybe you can set a config parameter to activate this mode.

[vtexier]

I have found the solution and updated the issue...