Modernize WinSock code.
socket-win32.cxx: Use AI_FQDN when querying own host name on Windows 7 and
later.
env.cxx: Modernize with C++11 features.
env.cxx (get_env_var): Use _dupenv_s() and _wdupenv_s() to avoid threading
issues.
env.cxx: Add missing _WIN32 guard around dup_env_var().
Fix compile errors uncovered by MinGW64 compilation.
env.cxx: Fix MinGW64 linking issue by partial revert of previous change.
lockfile.cxx: Remove pre-Windows XP support.
lockfile.cxx: Avoid caching LogLog reference for the uncommon case of error.
CMakeLists.txt: Set _WIN32_WINNT to 0x0600.
Remove #ifdefs guarding pre-Windows Vista cases.
README.md: Document changes in Windows versions support.
AUTHORS: Add Yaqian Shen name in Chinese characters.
docs/latex-header.tex: Fix LaTeX to PDF compilation.
README.md: We support OpenBSD 5.6 with GCC 4.9.0.
env.cxx: Fix compilation with Clang.
threads.cxx: Add AbstractThreadPtr parameter to thread's lambda
to remove the addReference()/removeReference() dance.
threads.cxx: Make sure AbstractThread::flags is initialized to 0.
threads.cxx: Use LogLog by reference instead of by pointer.
thread_test/main.cxx: Make SlowObject reference counted. Join threads.