This is a bugfix release. # Broker * Deal with poll() POLLIN/POLLOUT before POLL[RD]HUP to correctly handle the case where a client sends data and immediately closes its socket. # Library * Fix memory leak with messages of QoS=2. Fixes bug #1064981. * Fix potential thread synchronisation problem with outgoing packets in the Python module. Fixes bug #1064977. # Clients * Fix `mosquitto_sub -l` incorrectly only sending one message per second.