Originally part of 410296c abstracted out in backport
PR-URL: https://github.com/nodejs/node/pull/9385
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
