PHP 8.x Update

In class.fileaway_csv.php, we found 5 uses of an array still using curly braces. This no longer works, starting with PHP 8.x.

Basic example:

You had $ch = $data{$i}; but it now needs to be $ch = $data[$i];

You may want to make sure that all instances of curly braces for array (and even string) indexes are changed to the square brackets or it will affect everyone on the latest versions of PHP.

Thanks!