journald: close passed fds we cannot make sense of

journald: close passed fds we cannot make sense of

This is mostly likely the audit socket, and we really should close it
if we cannot make sense of it, since as long as it is open the kernel
might disable the kmsg forwarding of audit msgs, and we should avoid
that, since audit msgs might get completely lost then.

I also downgraded the log message we show a bit, after all things should
really work fine, and we proceed fine with it.