[libvirt] LIBVIRT_DEBUG=1 libvirtd regression

[Cole Robinson]

Hey Dan,

This commit changes the behavior of LIBVIRT_DEBUG=1 libvirtd:

$ git show 7022b09111d4322d21396a70d58320a9ad773962
commit 7022b09111d4322d21396a70d58320a9ad773962
Author: Daniel P. Berrange <berrange at redhat.com>
Date:   Thu Sep 27 13:13:09 2012 +0100

    Automatically enable systemd journal logging

    Probe to see if the systemd journal is accessible, and if
    so enable logging to the journal by default, rather than
    stderr (current default under systemd).


It still prints some output to stderr but it's extremely limited compared to
before. Surprised me at least, but I didn't dig too deeply for a solution.

Thanks,
Cole