test__socket_dns.py: do not raise an error when getaddrinfo raises DNSError(66, 'unknown') instead of gaierror(-5, 'No address associated with hostname')

Fix for issue #56: Make socket.getaddrinfo handle AF_UNSPEC properly and resolve service names. Thanks to Elizabeth Jennifer Myers.

testrunner.py: convert path to testresults.sqlite3 to work with tests that chdir (test__doctests.py)

--HG--
extra : transplant_source : i%9B%F8%D0%AB.%9F%02%9A%A4%2C%B1M%0C%B0%CC%03%12.%E2

--HG--
extra : transplant_source : I8%8F%CF%9C%8D%84%B1%D9%29%A4E%8C%3DHf%DD%F6%9E%E8

--HG--
extra : transplant_source : o%C6%8E%7D7%EBI%B6L%E4Ds%94%80%0A%E8%82%27%F8%26

--HG--
extra : transplant_source : %24A%A7%13%A6%C3%90%D9%CC%60%02%C7%D7%F2%E2%7E%B8ffm

gevent.monkey: add patch_httplib() function and 'httplib' argument to patch_all() (disabled by default)

--HG--
extra : transplant_source : %FE%D2%A0%C5%AE%1D%0E%0D%C3u%8F%00YK%C4%B5%80Q%A4%87

--HG--
extra : transplant_source : %80%F0%1F%9E%BA%3A%C1%05%23%D1%C4%E7Vq8%EE%87%E7%CB%88

--HG--
extra : transplant_source : %BFr%0D%A6%82%9B%D2%97%B8%EC%AE%F5%DE2%1A%F8h%01%C5Y

--HG--
extra : transplant_source : %A4Z%A8HLDj%28%8F%977%EC%C5%5Bl%3Ex%9A%5C%B6

--HG--
extra : transplant_source : %C6%09%D8s%A1%9A%F5%3C%8F%B8%CBxV%7D%AC2F%87%ED5

adapt previous patch to libevent 1.4: use evhttp_connection_new instead of evhttp_connection_base_new