http2: enable strict validation of HTTP/2 headers. (#25)
http2: enable strict validation of HTTP/2 headers. (#25)

Fixes CVE-2019-9516.

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

Mirrored from https://github.com/envoyproxy/envoy @ 84dabbf4f69257b4ca7bbbcd45d8e3ed9629ae98

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