original idea to split calling locations was to spawn tracing thread
in the final child process according to

    commit 8a745f2a
    Author: Michael Mueller
    Date:   Mon Sep 23 16:36:54 2013 +0200

os_daemonize is now on top of both locations. Drop unneeded ifs.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1452174932-28657-5-git-send-email-den@openvz.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>