bug#17187: 24.3.50.1 open-dribble-file stores pw

[Glenn Morris]

Stefan Monnier wrote:

>> As suggested a decade ago,
>> http://lists.gnu.org/archive/html/emacs-pretest-bug/2003-10/msg00229.html
>> the dribble file should be created with file permission bits = 600.
>
> Very much agreed.

PS maybe it should also abort with an error if the file already exists
(and is a symlink or is not owned by the current user?).