Use values instead of define names for _WIN32_WINNT and NTDDI_VERSION defined needed for Windows.h configuration. Using the names boost fails to correctly detect getaddrinfo() support on Windows. Only run IPv6 related test cases in DomainNameResolverTest on Windows, if test_ipv6=1 is passed to the scons arguments. This is because on Windows getaddrinfo() will not return IPv6 related results when called with the AF_UNSPEC hint, unless the Windows host has global IPv6 connectivity. Changed the BoostConnectionTest to time out and not endlessly wait on a response from the remote host. Test-Information: Ran the following test configurations: * (SUCCESS) On Windows 8 with HE.net IPv6 tunnel to provide full IPv6 connectiviy: scons.bat test=system test_ipv6=1 Swiften/QA/NetworkTest * (SUCCESS) On Windows 8 with HE.net IPv6 tunnel to provide full IPv6 connectiviy: scons.bat test=system Swiften/QA/NetworkTest * (EXPECTED FAIL) On Windows 8 with no IPv6 connectiviy: scons.bat test=system test_ipv6=1 Swiften/QA/NetworkTest * (SUCCESS) On Windows 8 with no IPv6 connectiviy: scons.bat test=system Swiften/QA/NetworkTest Change-Id: I5adcd28e09e22acf61f7cca40b614e71df75dd70