Restore exceptions for mixed case CDN paths
This site https://www.yr.no/ is using this URL https://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.12.3.min.js
Because of the uppercase q Decentraleyes doesn't intervene and the response goes out.
This was once reported in #61 (closed) and fixed with commit 445d663d.
With aspnetcdn user can choose any upper- and lowercase combination and it will work, so the whole path should be check in a case insensitive way.
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