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Patch [1446489 ] zipfile: support for ZIP64 also addresses this as a side-
effect of adding support ZIP64 support (for very big zipfiles).

BTW. I don't quite understand why this patch is put on hold just because a 
rewrite of the zipfile module is planned. 

W.r.t. this patch: why is the on-demand loading optional? Loading the per-file 
headers when the zipfile is opened is not necessary for normal operation, the 
current zipfile module is basically doing a full verify of the zipfile on all 
occassions. This isn't necessary for normal operation and I don't think the 
infozip tools do this (probably because verification is very  expensive).