added peak rates to peer_info

docs/manual.rst

@@ -2365,6 +2365,10 @@ It contains the following fields::
 		int receive_quota;
 
 		int rtt;
+
+		int download_rate_peak;
+		int upload_rate_peak;
+
 	};
 
 The ``flags`` attribute tells you in which state the peer is. It is set to
@@ -2567,6 +2571,9 @@ from the bandwidth manager.
 ``rtt`` is an estimated round trip time to this peer, in milliseconds. It is
 estimated by timing the the tcp ``connect()``. It may be 0 for incoming connections.
 
+``download_rate_peak`` and ``upload_rate_peak`` are the highest download and upload
+rates seen on this connection. They are given in bytes per second. This number is
+reset to 0 on reconnect.
 
 session_settings
 ================