Zero the body of the cookie placeholder in client requests as recommended by the latest NTS draft.
Make the NTS-KE retry interval exponentially increasing, using a factor provided by the NKE session. Use shorter intervals when the server is refusing TCP connections or the connection is closed or timing out before the TLS handshake.
Use the monotonic timestamp provided by the scheduler for NTS-KE rate limiting and refresh.
Add support for the NTS NTP extension fields.
