Allow most frames in 0-RTT

draft-ietf-quic-http.md

@@ -1482,6 +1482,13 @@ The use of 0-RTT with HTTP/3 creates an exposure to replay attack.  The
 anti-replay mitigations in {{!HTTP-REPLAY=RFC8470}} MUST be applied when using
 HTTP/3 with 0-RTT.
 
+Certain HTTP implementations use the client address for logging or
+access-control purposes.  Since a QUIC client's address might change during a
+connection (and future versions might support simultaneous use of multiple
+addresses), such implementations will need to either actively retrieve the
+client's current address or addresses when they are relevant or explicitly
+accept that the original address might change.
+
 
 # IANA Considerations