SSH-CERT: always initialize cert_verify_opts
    
    Currently cert_verify_opts is only initialized when there is an option
    in the config file. This might cause issues later when the struct is
    accessed. Since parse_cert_verify_opts() can already handle an empty
    option the additional check is not needed at all.
    
    Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
    (cherry picked from commit ecd48ae244dbb6490989752fba99b58d84babfa6)