If you have a zip file with permissions 644 on a unix
file system, and then torrentzip is used that file,
the files permissions change to 600.
The problem is that torrentzip is not preserving the
original permissions for the file.
see http://sourceforge.net/tracker/index.php?
func=detail&aid=1410208&group_id=135285&atid=732453
for a patch to fix this problem.
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File permissions on Linux have different names: rename all
instances of 'S_ISTXT' in the patch to 'S_ISVTX' and
trrntzip will then compile.