Fix multi endpoint support for http listener.
Fix multi endpoint support for http listener.

Test Plan: Run and use multiple HTTP endpoints on a single port.

Reviewers: hsychla, akuleshov, vtarasen

CC: aschultz, druss

Differential Revision: https://review.tpip.net/D731

(cherry picked from commit 83e602afd91754e0d865dd3bc3619373de9e1899)

travelping/hello