handles as wineserver handles
- console input handle object is no longer waitable (input record
  synchronisation is now implemented as a simple semaphore), and removed
  FD_TYPE_CONSOLE from fd types in wineserver
- console handles now always have their two lower bit set so one can
  distinguish a console handle from a kernel object handle
- implemented some undocumented kernel32 console related APIs
  (CloseConsoleHandle, GetConsoleInputWaitHandle, OpenConsoleW,
  VerifyConsoleIoHandle, DuplicateConsoleHandle)
- allowed a few kernel32 APIs to take console pseudo-handles
  (FlushFileBuffer, GetFileType, WaitFor*Object*)
- simplified the console inheritance at process creation
- in console tests, no longer create a console if one already exists