2017-05-02, Version 4.8.3 'Argon' (Maintenance)

Notable Changes:

* module:
  - The module loading global fallback to the Node executable's
    directory now works correctly on Windows.
    (Richard Lau) https://github.com/nodejs/node/pull/9283
* src:
  - fix base64 decoding in rare edgecase
    (Nikolai Vavilov) https://github.com/nodejs/node/pull/11995
* tls:
  - fix rare segmentation faults when using TLS
   * (Trevor Norris) https://github.com/nodejs/node/pull/11947
   * (Ben Noordhuis) https://github.com/nodejs/node/pull/11898
   * (jBarz) https://github.com/nodejs/node/pull/11776

PR-URL: https://github.com/nodejs/node/pull/12499