I need to set-up connection to the Redis service by the socket. How to set-up DSN?

By the code allows only DSN with valid url Connection.php:

if (false === $parsedUrl = parse_url($dsn)) {
    throw new InvalidArgumentException(sprintf('The given Redis DSN "%s" is invalid.', $dsn));
}

So DSN like "redis:///var/run/redis/redis.sock" is invalid.
Is there any reason for that or is it an architectural flaw?