Teach win32 about magic_cleanups to toggle the INHERIT bit for handles.

  This can only work for NT, since 9x cannot alter a handle's INHERIT bit
  without a DuplicateHandle() and then closing the original handle, which
  just doesn't fit into this API very well.

  {Actually, could be done with a bit of convolutions for FILE and fd,
  but this won't work by the ap_note_cleanups_for_h() api.)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@98045 13f79535-47bb-0310-9956-ffa450edef68