Fixes: https://github.com/nodejs/http2/issues/179
Was fixing issue #179 and encountered a segault that was
happening somewhat randomly on session destruction. Both
should be fixed
PR-URL: https://github.com/nodejs/node/pull/14239
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
