v0.8.3

• Feature: Pass full remote URI as parameter to authentication callback
  (#58 by @clue)

  // new third parameter passed to authentication callback
  $server->setAuth(function ($user, $pass, $remote) {
      $ip = parse_url($remote, PHP_URL_HOST);
      
      return ($ip === '127.0.0.1');
  });

• Fix: Fix connecting to IPv6 address via SOCKS5 server and validate target
  URI so hostname can not contain excessive URI components
  (#59 by @clue)

• Improve test suite by fixing HHVM build for now again and ignore future HHVM build errors
  (#57 by @clue)