snapshot: qemu: Remove restrictions preventing external checkpoints
snapshot: qemu: Remove restrictions preventing external checkpoints

Some of the pre-snapshot check have restrictions wired in regarding
configuration options that influence taking of external checkpoints.

This patch removes restrictions that would inhibit taking of such a
snapshot.

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