Adds support for auto smart microphone upgrade plus other new features

Improvement(s)

? Support for automatic smart microphone upgrade

? Improved RTCP-XR support

? Enable HSTS for web interface

? Improved security for web interface

? Use NTP server from DHCP 42

? Improved security in Unite authentication

? Change iLBC payload type default value to 104

✔️ Improved performance in high noise environments

Resolved Issue(s)

✔️ Phone stuck after hang-up

✔️ Sometimes incorrect LED status on the smart microphone