[BUG]: module hangs on init

Required prerequisites

• Make sure you've read the documentation. Your issue may be addressed there.
• Search the issue tracker and Discussions to verify that this hasn't already been reported. +1 or comment there if it has.
• Consider asking first in the Gitter chat room or in a Discussion.

What version (or hash if on master) of pybind11 are you using?

2.10.0 (vcpkg)

Problem description

I'm producing a module that uses the date library
On c++ initialization (aka on import my_module) the module (and python) hangs since the library is trying to access some data using curl. Windows is blocked in "waitforsingleobject" and linux in "__GI___select", same behaviour.
If I disable the auto-check of tzdata the module works normally.

Anuy idea why python/pybind11 interacts badly with curl on init ?

Reproducible example code

I can submit a minimal example if needed.

Is this a regression? Put the last known working version here if it is.

Not a regression

Start by reproducing the import hang with pybind11 2.10.0, the date library, curl, and automatic tzdata checking enabled, comparing the disabled setting on Windows and Linux. A minimal example is needed; done means determining whether pybind11 is involved and documenting a confirmed fix or workaround.