homepage

Not sure if this is desired behavior, but it's making my code break, so I figured I'd get it filed.
I'm trying to crawl this website: https://www.appeals2.az.gov/ODSPlus/recentDecisions2.cfm
Unfortunately, most of the URLs in the HTML are relative, taking the form:
'../../some/path/to/some/pdf.pdf'
I'm using lxml's make_links_absolute() function, which calls urljoin creating invalid urls like:
https://www.appeals2.az.gov/../Decisions/CR20130096OPN.pdf
If you put that into Firefox or wget or whatever, it works, despite being invalid and making no sense. 
**It works because those clients fix the problem,** joining the invalid path and the URL into:
https://www.appeals2.az.gov/Decisions/CR20130096OPN.pdf
I know this will mean making urljoin have a workaround to fix bad HTML, but this seems to be what wget, Chrome, Firefox, etc. all do. 
I've never filed a Python bugs before, but is this something we could consider?