tls: add support for client-side session resumption. (#4791)
tls: add support for client-side session resumption. (#4791)

Risk Level: Low
Testing: bazel test //test/...

Signed-off-by: Piotr Sikora <piotrsikora@google.com>

Mirrored from https://github.com/envoyproxy/envoy @ 97fa8855d115aed81ebe423135b8f023f41f64a7

lyft/envoy-api,lyft/envoy-api,lyft/envoy-api