Support Unicode Path Extra Field

[random-ua]

Different Zip software expects filenames with non-ASCII characters to be encoded in different charsets. For example to make files with cyrillic filenames visible in Windows Explorer ("compressed folders") I have to encode them into cp866. But that makes them unreadable by other archivers like 7-Zip and Info-ZIP etc. that expects windows-1251 charset (or Unicode Field, see below) to be used.

Solution was proposed by Info-ZIP developers: it allows to specify filename in Unicode (UTF-8) in EXTRA header field. This field called Unicode Path Extra Field (0x7075) in .ZIP File Format Specification(http://www.pkware.com/documents/casestudies/APPNOTE.TXT)
Many archivers (like two mentioned above) supports this feature. It's also used by GMail in "download all attachments" to encode attachments with non-ASCII names. So such file names specified twice: first in regular header field in some 8-bit charset (for old software), second - in extra field.

It would be great if mod_zip could support Unicode Paths.

[evanmiller]

Support added here:

667da70