Trust the gandi.net CA on OpenBSD
This website provides some HTTPS service. I bought the SSL certificate from a French provider called “Gandi”. Unfortunately, it seems their issuer is not known by OpenBSD nor is their own CA trusted by Firefox. As this is in the FAQ, they provide the CA file to manually import in Firefox. Once done, Firefox trusts the whole SSL path. We’ll use this to install the SSL trust path in OpenBSD ; in the OpenSSL instance.