Function PEM_write_bio_PKCS8PrivateKey 

pub unsafe extern "C" fn PEM_write_bio_PKCS8PrivateKey(
    arg1: *mut BIO,
    arg2: *const EVP_PKEY,
    arg3: *const EVP_CIPHER,
    kstr: *const c_char,
    klen: c_int,
    cb: pem_password_cb,
    u: *mut c_void,
) -> c_int