Eclipse Mosquitto 1.6.7
- Add workaround for working with libwebsockets 3.2.0.
- Fix potential crash when reloading config. Closes #1424, #1425.
- Don't use `/` in autogenerated client ids, to avoid confusing with topics.
- Fix `mosquitto_max_inflight_messages_set()` and `mosquitto_int_option(..., MOSQ_OPT_*_MAX, ...)` behaviour. Closes #1417.
- Fix regression on use of `mosquitto_connect_async()` not working. Closes #1415 and #1422.
- mosquitto_sub: Fix `-E` incorrectly not working unless `-d` was also specified. Closes #1418.
- Updated documentation around automatic client ids.
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