I am wondering which certificates bundle does httpi is using?
I am using centOS 5 that has ca-bundle.crt under /etc/pki/tls/certs/ca-bundle.crt
It seems that openSSL is using the above ca-bundle but httpi is not ?
HTTP Client has their own certificates bundled into it. See Issue #187.
This can be set using http_client.ssl_config.set_default_paths
to use the system certificates