This is necessary to provide TLS transport socket docs and to be able to have the TLS transport
socket added to the threat model docs (via its security_posture tag).
I did both v2/v3, since this is not technically a change to v2, justa file re-org, and the shadowing
machinery prefers file consistency across versions.
Risk level: Low (refactoring)
Testing: Docs generation and manual inspection.
Signed-off-by: Harvey Tuch <htuch@google.com>
Mirrored from https://github.com/envoyproxy/envoy @ ab32f5fd01ca8b23ee16dcffb55b1276e55bf1fa