generated openssl functions are broken

[smoench]

(at least on master)

As an example openssl_cipher_key_length return type is marked as void but should return an integer.

Currently:

/**
 * Gets the cipher key length.
 *
 * @param string $cipher_algo The cipher method, see openssl_get_cipher_methods for a list of potential values.
 * @return  Returns the cipher length on success.
 * @throws OpensslException
 *
 */
function openssl_cipher_key_length(string $cipher_algo): void
{
    error_clear_last();
    $safeResult = \openssl_cipher_key_length($cipher_algo);
    if ($safeResult === false) {
        throw OpensslException::createFromPhpError();
    }
}

Expected:

/**
 * Gets the cipher key length.
 *
 * @param string $cipher_algo The cipher method, see openssl_get_cipher_methods for a list of potential values.
 * @return int Returns the cipher length on success.
 * @throws OpensslException
 *
 */
function openssl_cipher_key_length(string $cipher_algo): int
{
    error_clear_last();
    $safeResult = \openssl_cipher_key_length($cipher_algo);
    if ($safeResult === false) {
        throw OpensslException::createFromPhpError();
    }
    return $safeResult;
}

There several more openssl functions with the same issue.