Better last-will handling
0.2.1 (2021-01-02) :
- Small breaking change: the format of the mqtt/state has been simplified: the message contains either connected or disconnected. Configuration information has been moved into a separate message mqtt/config.
- Support for no outgoing domain prefix (no 'omu') fixed.
- First test version of persistence libs jsonfiles.h with muReadVal() and muWriteVal()