std.zip: unicode issues

[dlangBugzillaToGithub]

bugzilla (@berni44) reported this on 2019-10-10T18:40:44Z

Transfered from https://issues.dlang.org/show_bug.cgi?id=20293

Description

Taken from #20027:

Rejects unicode path extra fields that overflow.

Rejects unicode path extra fields that underflow, whether zeroed or buffer bleed.

Rejects unicode path extra fields that have an invalid version.

Rejects unicode path extra fields that diverge from the central directory to prevent ambiguity, i.e. in file extension.

Rejects invalid UTF-8 strings.