Addressing comments from AD Ben Kaduk

[richanna]

1. Section 1 of -push should get the sentence "How SETs are defined and the process by which security events are identified for SET Recipients are specified in [RFC8417]."
2. In Section 5.3 of -push, replace "e.g., subject claims" with "PII" as was already done in -poll.
3. In Security Considerations for -push and -poll, add text explaining that determining the expected service identity to match against using DNS-ID is out of scope.
4. In Privacy Considerations for -push, add "SET Transmistters SHOULD attempt to deliver SETs that are targeted to the specific business and protocol needs of subscribers", as already exists within -poll.

[selfissued]

LGTM