pub fn fn_cert_req_extensions_append(
extensions: &Vec<CertReqExtension>,
extension: &CertReqExtension,
) -> Result<Vec<CertReqExtension>, FnError>pub fn fn_cert_req_extensions_append(
extensions: &Vec<CertReqExtension>,
extension: &CertReqExtension,
) -> Result<Vec<CertReqExtension>, FnError>