backport to 1.16: tls: fix detection of the upstream connection close event. (#13858)#14452

antoniovicente merged 5 commits intoenvoyproxy:release/v1.16envoyproxy/envoy:release/v1.16from

cpakulski:rel1.16/13858cpakulski/envoy:rel1.16/13858Copy head branch name to clipboard