bug#13070: Use putenv+unsetenv instead of modifying environ directly

[Fabrice Popineau]

Great.

Up to now, it seems to run ok. Provided I added some unsetenv() function for w32.

(And it is much cleaner that the quick and dirty hack I applied for myself.)

Thanks,

Fabrice

2012/12/3 Paul Eggert <eggert@cs.ucla.edu>

Tags: patch

The attached patch is in response to last week's thread on emacs-devel
<http://lists.gnu.org/archive/html/emacs-devel/2012-11/msg00514.html>.
It's relative to trunk bzr 111078.  Tested on Fedora 17.  I don't see
any issues related to the Microsoft port but I'm CC:ing this to Eli
and Fabrice just in case, as the original bug seems to be Windows-related.