[Issue 20027] std.zip susceptible to zip malware attacks

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20027

--- Comment #3 from berni44 <bugzilla at d-ecke.de> ---
I moved several of these "rejects" to separate issues, grouping them
thematically. I skipped issues, that are allready fixed, leaving here only the
overlapping stuff, where I'll provide a fix in a minute.

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