@item
Fixed not occurring handshake messages padding.
+@item
+Finish all SP protocol related goroutines, less memory leak.
+
+@item
+SP protocol generates less socket write calls, thus generating less TCP
+packets.
+
+@item
+Check @option{onlinedeadline} and @option{maxonlinetime} options every
+second, independently from socket reads (up to 10 seconds).
+
+@item
+Once per minute, if no other traffic exists, PING packets are sent in
+SP-connection. That allows faster determining of connection unworkability.
+
+@item
+@command{nncp-toss} uses lock-file to prevent simultaneous tossing.
+
@end itemize
@node Release 5.2.1