[LAD] jack / sched_deadline

[tim]

since recent kernels provide SCHED_DEADLINE, i'm porting my code to make
use of it.

* is there any plan to migrate jack1 and/or jack2 to use this scheduling
policy for the jack thread(s) of the application?

* what is the recommended way to set the scheduling policy of the jack
thread with the current API? afaict, the JackThreadInitCallback is
called before JackClient::AcquireSelfRealTime in jack2. (i cannot use
jack1 due to the old bug that jack corrupts the stack while trying to
pre-fault it)

thnx,
tim