This is a fairly minor feature release. The major changes are the pattern matching ACL support, the support for running directly as a Windows service and the change to the network code to attempt to send packets immediately. The Windows binary is now supplied as an installer rather than a zip file. * Add support for matching ACLs based on client id and username. * Add a Windows installer file (NSIS based). * Add native support for running the broker as a Windows service. This is the default when installed using the new installer. * Fix client count for listeners. When clients disconnect, decrement the count. Allow `max_connections` to work again. * Attempt to send all packets immediately upon being queued. This will result in more immediate network communication in many cases. * Log IP address when reporting CONNACK packets if the client id isn't yet known. * Fix payload length calculation in python `will_set` function. * Fix Python publish and `will_set` functions for payload=None. * Fix keepalive value being lost when reconnecting a client (bug #880863). * Persistence file writing now uses portable file functions, so the Cygwin broker build should no longer be necessary. * Duplicate code between the client and broker side has been reduced. * Queued messages for clients reconnecting with `clean_session=false` set were not being sent until the next message for that client was received. This has been fixed (bug #890724). * Fix subscriptions to # incorrectly matching against topics beginning with /