Always enable Zip64 extension for zipstreamer

[McNetic]

Is there any factual reason to disable zip64 on 32bit machines? ZipStreamer goes to quite some lengths to make sure it works properly on both 32bit and 64bit machines. It does not rely on 8 bit integers for zip64....

[mention-bot]

@McNetic, thanks for your PR! By analyzing the history of the files in this pull request, we identified @VicDeo, @nickvergessen and @MorrisJobke to be potential reviewers.

[LukasReschke]

@nickvergessen changed this with owncloud/core#19640, any memories what this was good for? :)

[LukasReschke]

I'd personally say let's try this and if someone complains in the beta phase of 13 we can go back here :-)

[nickvergessen]

any memories what this was good for? :)

See steps in the PR description?

[ChristophWurst]

Is this a duplicate of #5112 ?

[McNetic]

No. #5112 does the exact opposite; it disables Zip64 support (and thus, support for files bigger than 4 GB) completely.

[nickvergessen]

I don't have 32 bit anywhere, so I can not check if it really solves the issue and whether it works on 32bits. But since it seems to not work now and the change is proposed by the owner of the lib, I'm fine with changing it. :)

[McNetic]

Wait; this PR was totally unrelated to #5112 and #2352 (and it will not fix any problems described there). I just wondered (already some months ago) why Zip64 was disabled on 32bit machines at all. I will try on a 32bit machine as soon as possible.

[McNetic]

Meanwhile, I was able to test this on a 32bit machine, and have to admit the Zip64 support in ZipStreamer on 32bit machines is indeed broken. Unfortunately, it is not totally easy to fix the problem, so I would withdraw the PR until I can release a fixed version (I track the problem here: McNetic/PHPZipStreamer#38). Is it possible to revert the merge, or do I have to open a new PR?