add 'wfile' as a deprecated property

--HG--
extra : transplant_source : y%06%08-%B1%F6%CE%CA%FB%A8%B7%C33%C4%BBJ%F7%05%F1.

--HG--
extra : transplant_source : z5w%D1%3B%F5%C7%E5SE%06n%7E%23%97Y%7E%EA%E7%1C

--HG--
extra : transplant_source : i%EBn%DB%24%24%A2%7E%92%96%14%BAU%BF%D5%C0%16%86%B8%D5

--HG--
extra : transplant_source : %CA%97%B0n%D4%B4%91%04%D5%C3%02%97%FB%FE%82%13Z%8F%7E%B0

--HG--
extra : transplant_source : %14_t%C4%90%DCs%06%9C%3A%E8-6%7F%CC%AB%A6%8A%14%2A

replace get_hub().switch() with self.parent.switch - should be faster as it avoids accessing threadlocal

--HG--
extra : transplant_source : %95%EA%B0%28b%28%EB%3E%EC%B5%DC%26%AD%86%CA%89/%C6%B6%85

--HG--
extra : transplant_source : %7B%FDs%CF%3D0%CD%0C%25%C8%FA-F%E5%AFV%97%3D%8C%B2

--HG--
extra : transplant_source : %F7c8%40%E6%E5m%C4%25%8F%29%A8E%82%DF%B6c%F5%9A%A7

--HG--
extra : transplant_source : %D03%AC%98%5E%E6%E2T%06%82H%D8%7F%FD%E2%9C%A36%DDb

socket: resolve ipv6 and ipv4 concurrently in getaddrinfo() thus reducing the delay in AF_UNSPEC case

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)