BlueZ Features

Hi ,

I am nubie to BlueZ , so please bear with me if my questions sounds
dumb. I have some queries regarding the Bluez stack and I don't know
where exactly I can post the questions. Can you please help me with
this?.Basically my queries are listed below.

1) Does BlueZ support the latest BT 5.2/5.1/5.0 features?
2) What is the maximum BT specification BlueZ support?
3)What are the changes needed if we want to support the latest BT features?

Please let me know where I can get this information?. Looking forward
to hearing from you.

Regards,
Sri.