(absolutefn) [DOS_NT]: Support Novell drives whose drive

(absolutefn) [DOS_NT]: Support Novell drives whose drive
letter isn't an alphabetic character.
(main) [DOS_NT]: Use binary mode on redirected `stdout'.
(process_file) [DOS_NT]: Convert all slashes to forward style.
(absolute_filename) [DOS_NT]: Emit error message for relative
paths with a drive letter.
(absolute_filename) [DOS_NT]: Handle absolute pathnames with
DOS/NT drive letters which try to reference the parent of the root.
(absolute_dirname) [DOS_NT]: Convert all slashes to forward style.
info, and don't record undo info for the conversion.