Draft-22 defines Key and IV Update mechanism. As per point 4.6.3:
If the request_update field is set to "update_requested" then the
receiver MUST send a KeyUpdate of its own with request_update set to
"update_not_requested" prior to sending its next application data
record.
Which means feature is required in order to be fully complient with TLS 1.3 standard
Draft-22 defines
Key and IV Update
mechanism. As per point4.6.3
:Which means feature is required in order to be fully complient with TLS 1.3 standard