mosquitto/www/posts/2011/07/version-0-12-released.md

This is an update with some features and and bug fixes. The most significant change is configuration reloading support. This will be improved to include bridge reloading in the future.

• Reload (most) configuration on SIGHUP.
• Memory tracking is no longer compiled in the client library.
• Add --help option to mosquitto to display usage.
• Add --id-prefix option to clients to allow easier use with brokers that are using the clientid_prefix option.
• Fix compilation on QNX.
• Add -P as a synonym argument for --pw in the clients.
• Fix python MosquittoMessage payload parameter. This is now returned as a pointer to an array of c_uint8 values so binary data is handled correctly. If a string is needed, use msg.payload_str
• Fix memory leaks on client authentication.
• If password_file is not defined then clients can now connect even if they  use a username/password.
• Add mosquitto_reconnect() to the client library.
• Add option for compiling with liberal protocol compliance support (enabled by default).
• Fix problems with clients reconnecting and old messages remaining in the message store.
• Display both ip and client id in the log message when a client connects.
• Change the socket connection message to make it more obvious that it is just a socket connection being made (bug #801135).
• Fix retained message delivery where a subscription contains a +.
• Be more lenient when reloading persistent database to reduce errors with empty retained messages.