Secdir last call review of draft-ietf-quic-invariants-11

[Yoav Nir via Datatracker]

Reviewer: Yoav Nir
Review result: Ready

The contents of the "security and privacy considerations" section seems to be
advice for middlebox authors. I think that it may have been better to name the
section something else.  However, there is no information that is missing, so I
don't really have any recommendations for changing things.