note 57665 deleted from features.file-upload by felipe

Note Submitter: ohdotoh at randomnoisebursts dot com 

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my quick and simple don't overwrite files that exist solution:

if (file_exists($sysfolder . '/' . $filename)) {
// append a digit to the beginning of the name
  $tmpVar = 1;
  while(file_exists($sysfolder . '/' . $tmpVar . '-' . $filename)) {
// and keep increasing it until we have a unique name
    $tmpVar++;
    }
  $filename= $tmpVar . '-' . $filename;
  }