Add -4 and -6 switches to force IP protocol version

[ThiefMaster]

Would be useful in some cases, e.g. when a host serves different responses depending on the IP version.

-4and -6 are pretty common for this anyway.

[berkant]

No updates since 8 years?

[Almad]

We'd love to fix this, but when looking into it, we see it still blocked in the underlying libraries. We'll keep looking for solutions, but we can't promise any timeline since we don't see any easy fix.

Help or pointers very welcome!

[dwt]

@Almad could you give some pointers on this bug what kind of blockers you see, so whoever is interested in helping here doesn't have to dig out that information again? Thanks!

[Almad]

Ah, apologies, somehow thought it's linked here— https://github.com/psf/requests/issues/1691