Log into system log subsystem - typically syslog
### Current Situation

Currently, all logs are stored somewhere in /var/lib/... It's going directly from homebridge, not over some loggging system on OS. 

### Proposed Change

Enable choice (during start HB) how will by log stored. Current file or send it to the syslog.

### Additional Context

It's really helpful for develop latence in the chain. Common IoT system are able to log information to the syslog, so if I will be able to collect whole dataset with time synchronised sources, I will be develop where problem is much easier. 