backport to 1.15: http: fix datadog and squash handling of responses without body (#13328)#14458

Merged

alyssawilk merged 4 commits intoenvoyproxy:release/v1.15from cpakulski:rel1.15/13328

Jan 5, 2021

+1,705-1,635

Commits on Dec 17, 2020

http: fix datadog and squash handling of responses without bod (envoyproxy#13328 )

alyssawilk
authored and
cpakulski
committed
Corrected release notes.
cpakulski
committed

Commits on Dec 21, 2020