Fix broken links

[tfausak]

The sequel to #61.

• 404 http://chrispenner.ca/post/homebrew-haskell
• 404 http://winterland.me/2017/08/18/an%20unified%20array%20interface/
• 409 http://www.seas.upenn.edu/~sweirich/papers/systemd-submission.pdf
• 404 https://angel.co/nstack/jobs
• ERROR: HttpExceptionRequest Request { host = "arxiv.org" port = 443 secure = True requestHeaders = [] path = "/abs/1703.10857" queryString = "" method = "GET" proxy = Nothing rawBody = False redirectCount = 10 responseTimeout = ResponseTimeoutDefault requestVersion = HTTP/1.1 } (ConnectionFailure Network.Socket.sendBuf: failed (No error)) ("https://arxiv.org/abs/1703.10857")
• ERROR: HttpExceptionRequest Request { host = "blog.hustlr.in" port = 443 secure = True requestHeaders = [] path = "/posts/2017-07-19-midterm-eval.html" queryString = "" method = "GET" proxy = Nothing rawBody = False redirectCount = 10 responseTimeout = ResponseTimeoutDefault requestVersion = HTTP/1.1 } (InternalException (HandshakeFailed Error_EOF)) ("https://blog.hustlr.in/posts/2017-07-19-midterm-eval.html")
• 504 https://medium.com/@n0mad/when-competing-with-c-fudge-the-benchmark-16d3a91b437c
• 409 https://www.cis.upenn.edu/~jpaykin/papers/pz_linearity_monad_2017.pdf
• 404 https://www.shimweasel.com/2017/07/13/a-modest-scraping-proposal

[tfausak]

• http://chrispenner.ca/posts/homebrew-haskell
• http://winterland.me/2017/08/18/an-unified-array-interface/
• https://gitlab.com/vasanthaganeshk/hustlr-in/blob/9e8d8b23926165ddef9f11d22d2bc560f0f2cf08/posts/2017-07-19-midterm-eval.md