ZipExtraFields need data from central directory as well
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                 Key: SANDBOX-292
                 URL: https://issues.apache.org/jira/browse/SANDBOX-292
             Project: Commons Sandbox
          Issue Type: Improvement
          Components: Compress
            Reporter: Stefan Bodewig


Extra field data can be stored in two places inside a zip archive - the entries 
local file data and its central directory entry.

Currently ZipFile - like java.util.zip.* - ignores the data stored inside the 
central directory and assumes all information can be taken from the local file 
data part.

Unfortunately there are cases where an archiver uses different data, or even 
worse, only uses the central directory.  One such case comes up with 
SANDBOX-176 and WinZIP.  WinZIP uses InfoZIP extra fields to store Unicode 
versions of file names but it only stores them inside the central directory, 
where ZipFile doesn't look for them.


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