Eclipse Mosquitto™ 1.6.9

Broker:

- Fix session expiry with very large expiry intervals. Closes #1525.

- Check ACL patterns for validity when loading. Closes #1539.

- Use presence of password file as indicator for whether username checks

 should take place, not whether usernames are defined in the password file.

 Closes #1545.

- Strip whitespace from end of config file string options. Closes #1566.

- Satisfy valgrind when exiting on error due to not being able to open a

 listening socket, by calling freeaddrinfo. Closes #1565.

- Fix config->user not being freed on exit. Closes #1564.

- Fix trailing whitespace not being trimmed on acl users. Closes #1539.

- Fix `bind_interface` not working for the default listener. Closes #1533.

- Improve password file parsing in the broker and mosqitto_passwd. Closes #1584.

- Print OpenSSL errors in more situations, like when loading certificates

 fails. Closes #1552.

- Fix `mosquitto_client_protocol() returning incorrect values.



Client library:

- Set minimum keepalive argument to `mosquitto_connect*()` to be 5 seconds.

 Closes #1550.

- Fix `mosquitto_topic_matches_sub()` not returning MOSQ_ERR_INVAL if the

 topic contains a wildcard. Closes #1589.



Clients:

- Fix `--remove-retained` not obeying the `-T` option for filtering out

 topics. Closes #1585.

- Default behaviour for v5 clients using `-c` is now to use infinite length

 sessions, as with v3 clients. Closes #1546.