Merge pull request #4740 from quicwg/ianswett-4591

Clarify how the initial CWND is limited

draft-ietf-quic-recovery.md

@@ -825,10 +825,11 @@ peer-reported ECN-CE count increases; see Section 13.4.2 of {{QUIC-TRANSPORT}}.
 
 QUIC begins every connection in slow start with the congestion window set to
 an initial value.  Endpoints SHOULD use an initial congestion window of 10 times
-the maximum datagram size (max_datagram_size), limited to the larger of 14720
-bytes or twice the maximum datagram size. This follows the analysis and
-recommendations in {{?RFC6928}}, increasing the byte limit to account for the
-smaller 8-byte overhead of UDP compared to the 20-byte overhead for TCP.
+the maximum datagram size (max_datagram_size), while limiting the window
+to the larger of 14720 bytes or twice the maximum datagram size. This follows
+the analysis and recommendations in {{?RFC6928}}, increasing the byte limit to
+account for the smaller 8-byte overhead of UDP compared to the 20-byte overhead
+for TCP.
 
 If the maximum datagram size changes during the connection, the initial
 congestion window SHOULD be recalculated with the new size.  If the maximum