bug#10980: GNU bugs information: logs for bug#10980

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Wed, 29 Jun 2016 19:02:25 -0400
> Cc: 10980@debbugs.gnu.org, bo.johansson@lsn.se
> 
> Ah, I think I missed the idea that changing Vprocess_environment would
> still affect Emacs' environment (technically, what Emacs thinks its
> environment is, which has the same effect). Patch attached.

Thanks, please push to master, after fixing the following minor
issues:

> * src/emacs.c (main): For WINDOWSNT platform, move init_environment
> calls after the set_initial_environment call.  This prevents Emacs'
> modifications to the environment from contaminating Vprocess_environment
> and Vinitial_environment (Bug #10980).

Code changes in fragments guarded by preprocessor conditionals should
be formatted like this:

  * src/emacs.c (main) [WINDOWSNT]: Move init_environment calls after ...

> * src/callproc.c (getenv_internal): Consult Emacs' internal environment
> in as a fallback to Vprocess_environment on WINDOWSNT platforms.

Same here.

> +        *valuelen = strlen(tmpval);
                       ^^^^^^^
Please leave a single blank between a function's name and the
following opening parenthesis.

> +  /* Initialize environment from registry settings.  Make sure to do
> +     this only after calling set_initial_environment so that
> +     Vinitial_environment and Vprocess_environment will contain only
> +     variables from the parent process without modifications from
> +     Emacs. */

Please leave 2 blanks between the last period of the comment text and
the comment terminator "*/".

Bonus points for adding a test for this issue.