The curl URL parser wrongly accepts percent-encoded URL separators like '/'when decoding the host name part of a URL making it a *different* URL usingthe wrong host name when it is later retrieved.For example a URL like `http://example.com%2F127.0.0.1/` would be allowed bythe parser and get transposed into `http://example.com/127.0.0.1/`. This flawcan be used to circumvent filters checks and more.

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