Don't hang on /status/ for newer Node
Summary: At some point, Node started requiring us to read data before we can get the 'end' event, it seems. Fixes T2953.
Test Plan: Ran server in --foreground mode on node v0.11.0, made request to /status/, got response.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2953
Differential Revision: https://secure.phabricator.com/D5666