Gets the #GTlsCertificate representing @cert's issuer, if known
Return: The certificate of @cert's issuer, or %NULL if @cert is self-signed or signed with an unknown certificate.
2.28
See Implementation
Gets the #GTlsCertificate representing @cert's issuer, if known
Return: The certificate of @cert's issuer, or %NULL if @cert is self-signed or signed with an unknown certificate.