fixed #66

[canonknipser]

Added warning for list()

[iMattPro]

I'm not sure we need this. This test is for functions we don't want people using within phpBB. We do not need to discourage list() because this change for PHP 7 is hardly going to affect any one who does use it.

These results are identical, whether using 5 or 7:

$info = array('coffee', 'brown', 'caffeine');
list($drink, $color, $power) = $info;
echo "$drink is $color and $power makes it special.";

# coffee is brown and caffeine makes it special.

Likewise this is identical results too:

$info = array('coffee', 'brown', 'caffeine');
list($a[0], $a[1], $a[2]) = $info;
echo "$a[0] is $a[1] and $a[2] makes it special.";

# coffee is brown and caffeine makes it special.

The difference between 5 and 7 is just the array order (note index associations are still same):

Output of $a in the above example in PHP 7:
array {
  0 => "coffee"
  1 => "brown"
  2 => "caffeine"
}

Output of $a in the above example in PHP 5:
array {
  2 => "caffeine"
  1 => "brown"
  0 => "coffee"
}