conf: domainlist: Explicitly report failure to load domain config
conf: domainlist: Explicitly report failure to load domain config

When dropping a domain report which one was dropped so that it's not
necessary to rummage through the logs.

crobinso/libvirt,olafhering/libvirt,zippy2/libvirt,nertpinx/libvirt,andreabolognani/libvirt,crobinso/libvirt,crobinso/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,jfehlig/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,crobinso/libvirt,libvirt/libvirt,olafhering/libvirt,zippy2/libvirt,jfehlig/libvirt,jardasgit/libvirt,nertpinx/libvirt,libvirt/libvirt,olafhering/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,zippy2/libvirt,zippy2/libvirt,eskultety/libvirt,jardasgit/libvirt,jfehlig/libvirt,nertpinx/libvirt,eskultety/libvirt,nertpinx/libvirt,jardasgit/libvirt,libvirt/libvirt,jardasgit/libvirt,nertpinx/libvirt,andreabolognani/libvirt,eskultety/libvirt,olafhering/libvirt,andreabolognani/libvirt,libvirt/libvirt,eskultety/libvirt,eskultety/libvirt,jfehlig/libvirt