Working JACKD client acting as an AVB talker
Working JACKD-based AVB listener
Minor cleanups
Update jackd_talker.c to match modified gPTP IPC interface

This is a port of Christopher Hall's commit
d34176fcd4c310eee69beb1663c35e32bb4e0928
Fix inappropriate use of 'int' variable in jackd_talker.c

This is a port of Christoph Hall's commit
392d42838e952f7e5b1b7714cfbb495ff5435b80