Merge branch 'feature/mqtt_submodule_update_23c8e1ec_v4.2' into 'release/v4.2'

MQTT: Update submodule reference to da850b (config, error flags, minor fixes) (v4.2)

See merge request espressif/esp-idf!11312
This commit is contained in:
David Čermák
2020-12-15 16:13:03 +08:00