This patch regenerates the auto-generated files.
There are no significant changes, the protobuf just get an updated
comment due to protoc version change, but it is just informational.
Two new TLS ciphers are added, matching the new IANA assignments.
This patch updates the auto-generated code to match the latest tooling
versions.
In particular, the protobufs are regenerated, and the new version no
longer supports unkeyed literals, so some minor changes are needed.
Other than that, the cipher list is extended with the latest ciphers.
This patch extends various packages and integration tests, increasing
test coverage. They're small enough that it's not worth splitting them
up, as it would add a lot of noise to the history.
There are a couple of places where it's handy to print TLS constants in
human-readable form.
To do so, we need functions that take TLS constants (usually in uint16 form)
and give us friendly strings.
Go's crypto/tls package does not provide us with this, so this patch
introduces a new module with that purpose.
