Lib removes multiple dots from URL

[kkochanski]

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The library is properly handling one or two dots in the URL path, but not properly when we've got there more dots than two.

E.g. http://www.example.com/../a/b/../c/./d.html -> http://www.example.com/a/c/d.html - That's OK http://www.example.com/.../..../d.html -> ``http://www.example.com/d.html` - That's not OK, the first URL shouldn't change as it's valid.