ropaxin-rx.net robots.txt parsing

Ropaxin-rx.net has robots.txt file. Http response code is 200.
Robots size is very small. It is about 9 kb and 3 rows.

ropaxin-rx.net has sitemap file http://www.ropaxin-rx.net/sitemap.xml. Robots.txt contains very strange content because there only allow rules and no disallow.

Host directive is not presented for domain ropaxin-rx.net in robots.txt file.

Array
(
    [*] => Array
        (
            [allow] => Array
                (
                    [0] => /
                )

            [sitemap] => Array
                (
                    [0] => http://www.ropaxin-rx.net/sitemap.xml
                )

        )

)

User-agent: *
Allow: /
Sitemap: http://www.ropaxin-rx.net/sitemap.xml

код 200 http://ropaxin-rx.net/robots.txt