Mondjuk ez nem a site hibája, hogy a Bingbot identitászavarban van. :)
3.2.1 The User-agent line
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The name token a robot chooses for itself should be sent as part of the HTTP User-agent header, and must be well documented.
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The robot must obey the first record in /robots.txt that contains a User-Agent line whose value contains the name token of the robot as a substring.