Migrated cSleep and cTimer to std::chrono

src/main.cpp

@@ -160,7 +160,10 @@ BOOL CtrlHandler(DWORD fdwCtrlType)
 
 	if (fdwCtrlType == CTRL_CLOSE_EVENT)  // Console window closed via 'x' button, Windows will try to close immediately, therefore...
 	{
-		while (!g_ServerTerminated) { cSleep::MilliSleep(100); }  // Delay as much as possible to try to get the server to shut down cleanly
+		while (!g_ServerTerminated)
+		{
+			std::this_thread::sleep_for(std::chrono::milliseconds(50));  // Delay as much as possible to try to get the server to shut down cleanly
+		}
 	}
 
 	return TRUE;