J Hodges, R Morgan, M Wahl - 2000 - dl.acm.org
… This section describes the Start TLS extended request and extended response themselves:
how to form the request, the form of the response, and enumerates the various result codes
the client MUST be prepared to handle. … A Start TLS extended response MUST contain a
responseName field which MUST be set to the same string as that in the responseName field
present in the Start TLS extended request. The response field is absent. The server MUST
set the resultCode field to either success or one of the other values outlined in section 2.3 …