Add rel="nofollow" admin setting is not working right, its making parent domain link as nofollow

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It’s not that simple.

uri_domain = uri.host  
uri_domain = "#{uri.host.split('.')[1]}.#{uri.host.split('.')[2]}" if uri.host && uri.host.split('.').size == 3  
uri_domain = "#{uri.host.split('.')[1]}.#{uri.host.split('.')[2]}.#{uri.host.split('.')[3]}" if uri.host && uri.host.split('.').size == 4

This code fails when people use naked ccSLD’s like example.co.uk (will follow everything in co.uk).

Also myblog.blogspot.com will follow everything at blogspot.com…

You should use View the Public Suffix List to resolve this…

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