• Change the wakeup logic associated with having multiple sleepers on multiple different audit pipes. The old method used cv_signal() which would result in only one thread being woken up after we appended a record to it's queue. This resulted in un-timely wake-ups when processing audit records real-time.

• Assign PSOCK priority to threads that have been sleeping on a read(2). This is the same priority threads are woken up with when they select(2) or poll(2). This yields fairness between various forms of sleep on the audit pipes.

Obtained from: TrustedBSD Project
Discussed with: rwatson
MFC after: 1 week