Pypac

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- Drop support for Python 3.4. (48)
- Support more proxy keywords: HTTP, HTTPS, SOCKS4, SOCKS5. (41)
- Absorb any exception from ``tld.get_tld()``, not just TldDomainNotFound. (30) Thanks santiavenda2.
- Reimplement ``dnsDomainIs(host, domain)`` as case-insensitive 'host ends with domain'. (42, 57)

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- Add ability to supply ``PACFile`` to ``pac_context_for_url()``. (52) Thanks alexrohvarger.

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- Make it possible to configure the request for the PAC file. (44) Thanks SeyfSV.
- urlencode proxy username and password. (46) Thanks aslafy-z.

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- Fix possible error when ``dnsResolve()`` fails. (34) Thanks maximinus.

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- Require dukpy 0.2.2, to fix memory leak. (32) Thanks maximinus.
- Change Mac environment marker. (30)
- Support Python 3.7.

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- Require tld 0.9.x. (29)