resolve abnormal urls in compliance with rfc3986 #1482
Merged
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Some webpages may have abnormal URLs i.e. there are more ".." segments in a relative path reference than there are hierarchical levels in the base URL. Currently such extra segments are not resolved and remain as is. However, the extra segments should be removed according to
https://tools.ietf.org/html/rfc3986#section-5.4.2 .
This will fix relative URL resolution and add test cases from rfc3986.