Start the salt syndic.

def salt_syndic():
    '''
    Start the salt syndic.
    '''
    import salt.utils.process
    salt.utils.process.notify_systemd()

    import salt.cli.daemons
    pid = os.getpid()
    try:
        syndic = salt.cli.daemons.Syndic()
        syndic.start()
    except KeyboardInterrupt:
        os.kill(pid, 15)