[Issue 20120] libcurl.dll hangs when running std.net.curl unittests

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20120

--- Comment #1 from Rainer Schuetze <r.sagitario at gmx.de> ---
Might be related to the version of libcurl: LDC comes with version 7.48.0, and
the regression happened when upgrading from 7.47.1 to 7.51.0

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