Re: [PATCH v3] connect, protocol: log negotiated protocol version

> It is useful for performance monitoring and debugging purposes to know
> the wire protocol used for remote operations. This may differ from the
> version set in local configuration due to differences in version and/or
> configuration between the server and the client. Therefore, log the
> negotiated wire protocol version via trace2, for both clients and
> servers.
>
> Signed-off-by: Josh Steadmon <steadmon@google.com>
> ---
>
> Changes in V3:
> * remove unnecessary `test` calls in the new t5705 test cases
> * remove the wire protocol version formatting function
> * log the wire protocol version enum value directly, as in V0 of this
>   series
> * avoid logging the protocol version if negotiation fails (i.e., if we
>   end up with "protocol_unknown_version")