Add support for TLS 1.3 Record format
TLS 1.3 introduces a new record format which among others allows arbitrary padding. We should introduce support for it and revive the gnutls_record_send_range() API.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
TLS 1.3 introduces a new record format which among others allows arbitrary padding. We should introduce support for it and revive the gnutls_record_send_range() API.