just once we play vice versa: I write and you read ;)

I dont know this being a standard, nor I know if it is wise.. but why dont use directly perl instead?

Adapting my Modules as configuration files you can have ( in modconfenv.pm ):

use strict;
use warnings;

$ENV{XX} = 42;
$ENV{YY} = 'whatever you wont';

unshift @ARGV,$_ for  reverse
                      map {s/\s*#.*$|^\s*#.*$//; (split ' ',$_,2)}
                      split /\n/,  <<'EOCONF'

--put here your
--list of arguments and

#any
    #indented
--comment #comments
  --too

EOCONF
;
print "@ARGV" unless caller;
1;
[download]

and then just perl -Mmodconfenv -e "print qq($ENV{XX} $ENV{YY})"

L*