"SSL: CERTIFICATE_VERIFY_FAILED" should show cert at least with --debug

[lathspell]

When connecting to a site with a broken TLS certificate, httpie only displays the one-liner Python error message.

It would be nice, if it would print the certificate chain in human readable form, maybe even with a hint that e.g. the intermediate certificate is no longer valid, the common name does not match or the certificate is self signed.

[darthbeep]

I'd like to take this issue.

[jkbrzt]

@darthbeep go for it 👍

[darthbeep]

Would you be ok with importing sockets and cryptography? I'm not sure it's possible to do without them.

[isidentical]

@lathspell would you mind sharing an example website that we can use to reproduce this problem?