Only allow 'stderr' log output when running setuid (CVE-2013-4400)
Only allow 'stderr' log output when running setuid (CVE-2013-4400)

We must not allow file/syslog/journald log outputs when running
setuid since they can be abused to do bad things. In particular
the 'file' output can be used to overwrite files.

Signed-off-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

fabianfreyer/libvirt,fabianfreyer/libvirt,zippy2/libvirt,datto/libvirt,agx/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,zhlcindy/libvirt-1.1.4-maintain,libvirt/libvirt,zhlcindy/libvirt-1.1.4-maintain,jardasgit/libvirt,fabianfreyer/libvirt,cbosdo/libvirt,elmarco/libvirt,taget/libvirt,eskultety/libvirt,cbosdo/libvirt,datto/libvirt,zippy2/libvirt,zhlcindy/libvirt-1.1.4-maintain,VenkatDatta/libvirt,VenkatDatta/libvirt,cbosdo/libvirt,jardasgit/libvirt,crobinso/libvirt,shugaoye/libvirt,andreabolognani/libvirt,shugaoye/libvirt,rlaager/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,jfehlig/libvirt,taget/libvirt,datto/libvirt,olafhering/libvirt,olafhering/libvirt,andreabolognani/libvirt,agx/libvirt,libvirt/libvirt,rlaager/libvirt,shugaoye/libvirt,taget/libvirt,zhlcindy/libvirt-1.1.4-maintain,elmarco/libvirt,cbosdo/libvirt,olafhering/libvirt,libvirt/libvirt,andreabolognani/libvirt,crobinso/libvirt,eskultety/libvirt,jardasgit/libvirt,andreabolognani/libvirt,taget/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,agx/libvirt,eskultety/libvirt,rlaager/libvirt,zippy2/libvirt,eskultety/libvirt,crobinso/libvirt,rlaager/libvirt,jfehlig/libvirt,crobinso/libvirt,elmarco/libvirt,elmarco/libvirt,shugaoye/libvirt,jfehlig/libvirt,shugaoye/libvirt,taget/libvirt,libvirt/libvirt,olafhering/libvirt,zhlcindy/libvirt-1.1.4-maintain,VenkatDatta/libvirt,datto/libvirt,rlaager/libvirt,eskultety/libvirt,datto/libvirt,agx/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,nertpinx/libvirt,jardasgit/libvirt,cbosdo/libvirt,zippy2/libvirt,jfehlig/libvirt,elmarco/libvirt,andreabolognani/libvirt,agx/libvirt