Fix chmodzip

[wilzbach]

RE https://github.com/dlang/tools/pull/233/files#r122169048

I'm not sure about these changes - on one hand if the script wasn't building no idea if it was actually used any more, on the other hand this needs to work correctly so that unzipping .zip files on POSIX results in the correct attributes being set for files, and I doubt this is tested automatically anywhere right now. @MartinNowak ?

Is this script even used anywhere at dlang? I couldn't find it anywhere at dlang.
The README is the only hit...
-> I would be in favor of simply removing this file.

[dlang-bot]

Thanks for your pull request, @wilzbach!

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[CyberShadow]

I'm totally fine with removing the file if @MartinNowak says he doesn't need it. (Why was it in this repo in the first place then? When did it stop being used?)

[MartinNowak]

What does it even do? dlang.org is using chmgen to build d.tag for dman.
IMO we shoudl remove anything not strictly needed.

[CyberShadow]

It changes attributes of files in zip archives, presumably so that you can create a zip archive that has correct attributes whether it's unpacked on Windows or POSIX.

[MartinNowak]

It changes attributes of files in zip archives, presumably so that you can create a zip archive that has correct attributes whether it's unpacked on Windows or POSIX.

I've long added fileAttributes to std.zip, which allows to copy them from OS specific stat info. Let's remove the tool if we don't ship it nor use it anywhere.

[wilzbach]

Let's remove the tool if we don't ship it nor use it anywhere.

-> #247

(used your comments to provide a helpful commit message. Thanks!)