[m-rev.] diff: make_temp_directory now improves security for mono on POSIX-like OSs

[Julien Fischer]

Hi Paul,

On Mon, 2 May 2016, Paul Bone wrote:

> make_temp_directory now improves security for mono on POSIX-like OSs
>
> library/io.m:
>    The make_temp_directory code for C# now supports both mono on POSIX and
>    .NET on Windows.  It executes different code on different platforms to
>    set permissions correctly.

I've tested with mono 3.2.5 on OS X and it seems fine.

Julien.