* add shutdown flag
* add more register definitions
* add start commando for client side connections
* add first support for port 8899
* fix shutdown
* add client_mode configuration
* read client_mode config to setup inverter connections
* add client_mode connections over port 8899
* add preview build
* add documentation for client_mode
* catch os error and log thme with DEBUG level
* update changelog
* add shutdown flag
* add more register definitions
* add start commando for client side connections
* add first support for port 8899
* fix shutdown
* add client_mode configuration
* read client_mode config to setup inverter connections
* add client_mode connections over port 8899
* add preview build