This is a bugfix release. * Will messages are now only sent when a client disconnects unexpectedly. * Fix all incoming topics/subscriptions that start with a / or contain multiple / in a row (//). This should finally fix bug [#530099]. * Do actually disconnect client when it sends an empty subscription/topic string. * Add missing $SYS/broker/clients/total to man page. [#530099]: https://bugs.launchpad.net/mosquitto/+bug/530099