Known problems

* Option -rmtree doesn't remove directories.
  This only happens with the Windows console and zsh version if
  it is compiled with Borland 5.x. The problem is not there when
  wcd is compiled with any other compiler.

* Garbage printed on screen after exit.
  Occurs in Windows NT/2000/XP console with large buffer
  with wcd for win32 when PDC_RESTORE_SCREEN is set.
  Windows only allows a relatively small buffer size to save.

