Cleanup jthread and fix win32 build

src/ban.cpp

src/client.cpp

src/clientmap.cpp

src/debug.cpp

src/emerge.cpp

src/jthread/CMakeLists.txt

src/jthread/jevent.h

src/jthread/jmutex.h

src/jthread/jthread.h

src/jthread/pthread/jevent.cpp

src/jthread/pthread/jmutex.cpp

src/jthread/pthread/jsemaphore.cpp

src/jthread/pthread/jthread.cpp

src/jthread/win32/jevent.cpp

src/jthread/win32/jmutex.cpp

src/jthread/win32/jthread.cpp

src/main.cpp

src/map.cpp

src/mapblock.cpp

src/profiler.h