Version 0 6 Released - Mosquitto

This is a new features release. It offers quite a bit of change over the previous version. More details of the new features can be found in the man pages.

The substantial changes are:

Basic support for connecting multiple MQTT brokers together (bridging).
mosquitto_sub can now subscribe to multiple topics (limited to a global QoS).
mosquitto_pub can now send a file as a message.
mosquitto_pub can now read all of stdin and send it as a message.
mosquitto_pub can now read stdin and send each line as a message.
Implement a more efficient database design, so that only one copy of each message is held in the database, rather than one per subscribed client.
Add support for automatic upgrading of the mosquitto DB from v1 to v2.
If a retained message is received with a zero length payload, the retained message for that topic is deleted.
Implement the max_inflight_messages and max_queued_messages features in the broker.

The less visible features and bug fixes are as follows:

Add support for disabling clean session for the sub client.
mosquitto will now correctly run VACUUM on the persistent database on exit.
Add the store_cleanup_interval config option for dealing with the internal message store.
Add persistence_file config option to allow changing the filename of the persistence database. This allows multiple mosquitto DBs to be stored in the same location whilst keeping persistence_location compatible with rsmb.
Don't store QoS=0 messages for disconnected clients. Fixes bug #572608. This wasn't correctly fixed in version 0.5.
Don't disconnect clients if they send a PUBLISH with zero length payload (bug #573610).
Send through zero length messages.
Produce a warning on unsupported rsmb options instead of quitting.
Describe clean session flag in the mqtt man page.

Get it from the download page. Windows and Ubuntu binaries will follow along shortly.