handle reordered NEW_CONNECTION_ID frames

draft-ietf-quic-transport.md

@@ -5409,26 +5409,22 @@ sequence number, or if a sequence number is used for different connection
 IDs, the endpoint MAY treat that receipt as a connection error of type
 PROTOCOL_VIOLATION.
 
-The Retire Prior To field is a request for the peer to retire all connection IDs
-with a sequence number less than the specified value.  This includes the initial
-and preferred_address transport parameter connection IDs.  The peer SHOULD
-retire the corresponding connection IDs and send the corresponding
-RETIRE_CONNECTION_ID frames in a timely manner.
-
-An endpoint that receives a NEW_CONNECTION_ID frame with a sequence number
-smaller than the Retire Prior To field of a previously received
-NEW_CONNECTION_ID frame MUST immediately send a corresponding
-RETIRE_CONNECTION_ID frame that retires the newly received connection ID.
-
-The Retire Prior To field MUST be less than or equal to the Sequence Number
-field.  Receiving a value greater than the Sequence Number MUST be treated as a
+The Retire Prior To field counts connection IDs established during connection
+setup and the preferred_address transport parameter (see {{retiring-cids}}). The
+Retire Prior To field MUST be less than or equal to the Sequence Number field.
+Receiving a value greater than the Sequence Number MUST be treated as a
 connection error of type FRAME_ENCODING_ERROR.
 
 Once a sender indicates a Retire Prior To value, smaller values sent in
 subsequent NEW_CONNECTION_ID frames have no effect. A receiver MUST ignore any
 Retire Prior To fields that do not increase the largest received Retire Prior To
 value.
 
+An endpoint that receives a NEW_CONNECTION_ID frame with a sequence number
+smaller than the Retire Prior To field of a previously received
+NEW_CONNECTION_ID frame MUST immediately send a corresponding
+RETIRE_CONNECTION_ID frame that retires the newly received connection ID.
+
 
 ## RETIRE_CONNECTION_ID Frame {#frame-retire-connection-id}