3rd-party Exception for MIT licensed "example client"

Hello,

I'm building a Drupal wrapper around a client to talk to the StatsD daemon (https://github.com/etsy/statsd). In particular, I would like to include a modified version of the php-example.php file (which is an example client) as part of the module. The modified file would keep the same interface as the example, but would be "Drupalized".

I'm a bit uncertain about how "modified" my client has to be to be safely included.