daemon: Fix error message when libvirtd is missing.
daemon: Fix error message when libvirtd is missing.

Currently we search along the hard-coded names:
  SBINDIR "/libvirtd"
  SBINDIR "/libvirtd_dbg"
but if the environment variable $LIBVIRTD_PATH is set to the
name of the libvirtd binary, that is used instead.  Fix the
error message so it accurately reflects current behaviour
($PATH is NOT searched).

warewolf/libvirt,iam-TJ/libvirt,agx/libvirt,rlaager/libvirt,eskultety/libvirt,rlaager/libvirt,zhlcindy/libvirt-1.1.4-maintain,zippy2/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,shugaoye/libvirt,iam-TJ/libvirt,crobinso/libvirt,trainstack/libvirt,jeckersb/libvirt,warewolf/libvirt,eskultety/libvirt,andreabolognani/libvirt,datto/libvirt,trainstack/libvirt,nertpinx/libvirt,rlaager/libvirt,cbosdo/libvirt,andreabolognani/libvirt,zhlcindy/libvirt-1.1.4-maintain,zippy2/libvirt,datto/libvirt,elmarco/libvirt,crobinso/libvirt,warewolf/libvirt,nertpinx/libvirt,jardasgit/libvirt,emaste/libvirt,novel/fbsd-libvirt,novel/fbsd-libvirt,VenkatDatta/libvirt,jardasgit/libvirt,siboulet/libvirt-openvz,shugaoye/libvirt,siboulet/libvirt-openvz,novel/fbsd-libvirt,jardasgit/libvirt,bjzhang/libvirt,libvirt/libvirt,elmarco/libvirt,siboulet/libvirt-openvz,novel/fbsd-libvirt,jeckersb/libvirt,emaste/libvirt,bjzhang/libvirt,jfehlig/libvirt,elmarco/libvirt,VenkatDatta/libvirt,trainstack/libvirt,zippy2/libvirt,eskultety/libvirt,zippy2/libvirt,trainstack/libvirt,zhlcindy/libvirt-1.1.4-maintain,nertpinx/libvirt,warewolf/libvirt,agx/libvirt,libvirt/libvirt,jeckersb/libvirt,olafhering/libvirt,fabianfreyer/libvirt,warewolf/libvirt,cbosdo/libvirt,taget/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,eskultety/libvirt,jeckersb/libvirt,warewolf/libvirt,andreabolognani/libvirt,trainstack/libvirt,olafhering/libvirt,bjzhang/libvirt,andreabolognani/libvirt,zhlcindy/libvirt-1.1.4-maintain,emaste/libvirt,rlaager/libvirt,emaste/libvirt,VenkatDatta/libvirt,siboulet/libvirt-openvz,nertpinx/libvirt,elmarco/libvirt,rlaager/libvirt,olafhering/libvirt,jardasgit/libvirt,emaste/libvirt,jfehlig/libvirt,emaste/libvirt,trainstack/libvirt,taget/libvirt,fabianfreyer/libvirt,iam-TJ/libvirt,zhlcindy/libvirt-1.1.4-maintain,iam-TJ/libvirt,datto/libvirt,novel/fbsd-libvirt,emaste/libvirt,taget/libvirt,shugaoye/libvirt,novel/fbsd-libvirt,agx/libvirt,cbosdo/libvirt,shugaoye/libvirt,datto/libvirt,crobinso/libvirt,novel/fbsd-libvirt,andreabolognani/libvirt,iam-TJ/libvirt,cbosdo/libvirt,fabianfreyer/libvirt,iam-TJ/libvirt,novel/fbsd-libvirt,fabianfreyer/libvirt,elmarco/libvirt,cbosdo/libvirt,libvirt/libvirt,libvirt/libvirt,jeckersb/libvirt,crobinso/libvirt,warewolf/libvirt,jeckersb/libvirt,nertpinx/libvirt,agx/libvirt,taget/libvirt,bjzhang/libvirt,olafhering/libvirt,iam-TJ/libvirt,VenkatDatta/libvirt,datto/libvirt,shugaoye/libvirt,jfehlig/libvirt,trainstack/libvirt,agx/libvirt,novel/fbsd-libvirt,taget/libvirt,siboulet/libvirt-openvz,bjzhang/libvirt,eskultety/libvirt,jeckersb/libvirt