Compatibility with pip-system-certs

[defransen]

Environment

1. OS: Windows 10
2. Python: 3.10.2
3. Twine Installation: in Virtualenv with pip
4. Twine Version: 4.0.1
5. Target package repository: private Gitlab repository with enterprise certificates

The Issue

Twine replaces the HTTPAdapters in

twine/twine/repository.py

Lines 61 to 62 in 8f5e5d6

	for scheme in ("http://", "https://"):
	self.session.mount(scheme, self._make_adapter_with_retries())

This reverts the patching done by pip-system-certs

The (most simple) Solution

A better alternative would be to just assign the Retrys to the existing adapters:

retry = urllib3.Retry(
   ...
)
for scheme in ("http://", "https://"):
    self.session.adapters[scheme].max_retries = retry

[sigmavirus24]

That library isn't supported by us