Move some of the tracking code for the DLL to where it is used.
Add resync.ms (default 10) option at which we give up rate adjusting
and instead do a hard resync. This results in a jump in the position
of the graph clock.
It's better for PHC identification in multi-NIC systems. PHC numbering might be dependent on the probe order yet no bugs was observed. Still recommend this for more comfortable configuration.
Also added some guidance on what must be changed
As reported in #3217, PTP driver has to have the highest priority for packets to arrive in time
Everything connected to AES67 should be clocked by the Grandmaster clock
