Function bearssl_sys::br_ssl_client_set_single_rsa

pub unsafe extern "C" fn br_ssl_client_set_single_rsa(
    cc: *mut br_ssl_client_context, 
    chain: *const br_x509_certificate, 
    chain_len: usize, 
    sk: *const br_rsa_private_key, 
    irsasign: br_rsa_pkcs1_sign
)