Generate zip files with both OEM and UTF8 filename versions using 0x7075 header field

[unxed]

We currently suffer from kind of compromise: use vanilla p7zip and have full UTF8 file names support, or use this fork and have archives that are properly opened on windows platform.

But for sure we can achieve both at the same time! We just should write additional 0x7075 zip header field with UTF8 version of file names. So on windows OEM file names will be used, and linux packers (and winzip and winrar also) will use UTF8 filename version from 0x7075 field.

This is sample of correct multiplatform zip file that has both OEM and UTF8 file names versions. Such files can be correctly opened on windows, and preserve all UTF8 characters on other platforms also.
winzip.zip