qemu: Replace deprecated option of qemu-img
qemu: Replace deprecated option of qemu-img

qemu-img silently disable "-e", so we can't use it for volume
encryption anymore, change it into "-o encryption=on" if qemu
supports "-o" option.

novel/fbsd-libvirt,zhlcindy/libvirt-1.1.4-maintain,jeckersb/libvirt,taget/libvirt,crobinso/libvirt,trainstack/libvirt,dumbbell/libvirt,fabianfreyer/libvirt,rlaager/libvirt,dumbbell/libvirt,agx/libvirt,eskultety/libvirt,cbosdo/libvirt,taget/libvirt,olafhering/libvirt,emaste/libvirt,datto/libvirt,nertpinx/libvirt,iam-TJ/libvirt,rmarwaha/libvirt1,emaste/libvirt,bjzhang/libvirt,trainstack/libvirt,novel/fbsd-libvirt,zippy2/libvirt,andreabolognani/libvirt,soulxu/libvirt-xuhj,danwent/libvirt-ovs,novel/fbsd-libvirt,trainstack/libvirt,jeckersb/libvirt,leilihh/libvirt,iam-TJ/libvirt,kantai/libvirt-vfork,rlaager/libvirt,zippy2/libvirt,rbu/libvirt,rlaager/libvirt,rbu/libvirt,iam-TJ/libvirt,soulxu/libvirt-xuhj,elmarco/libvirt,rmarwaha/libvirt,warewolf/libvirt,rmarwaha/libvirt,datto/libvirt,rmarwaha/libvirt1,soulxu/libvirt-xuhj,foomango/libvirt,taget/libvirt,jeckersb/libvirt,novel/fbsd-libvirt,iam-TJ/libvirt,bjzhang/libvirt,foomango/libvirt,datto/libvirt,shugaoye/libvirt,rmarwaha/libvirt1,foomango/libvirt,soulxu/libvirt-xuhj,VenkatDatta/libvirt,elmarco/libvirt,danwent/libvirt-ovs,jfehlig/libvirt,libvirt/libvirt,shugaoye/libvirt,olafhering/libvirt,agx/libvirt,danwent/libvirt-ovs,rlaager/libvirt,emaste/libvirt,nertpinx/libvirt,libvirt/libvirt,jeckersb/libvirt,warewolf/libvirt,rmarwaha/libvirt,wiedi/libvirt,iam-TJ/libvirt,leilihh/libvirt,shugaoye/libvirt,andreabolognani/libvirt,bjzhang/libvirt,fabianfreyer/libvirt,wiedi/libvirt,wiedi/libvirt,dumbbell/libvirt,leilihh/libvirt,rmarwaha/libvirt,trainstack/libvirt,warewolf/libvirt,elmarco/libvirt,zippy2/libvirt,usc-isi/libvirt,shugaoye/libvirt,kantai/libvirt-vfork,libvirt/libvirt,eskultety/libvirt,emaste/libvirt,warewolf/libvirt,agx/libvirt,kantai/libvirt-vfork,andreabolognani/libvirt,VenkatDatta/libvirt,rmarwaha/libvirt1,novel/fbsd-libvirt,crobinso/libvirt,rlaager/libvirt,nertpinx/libvirt,bjzhang/libvirt,eskultety/libvirt,iam-TJ/libvirt,usc-isi/libvirt,rbu/libvirt,zhlcindy/libvirt-1.1.4-maintain,jardasgit/libvirt,cbosdo/libvirt,taget/libvirt,agx/libvirt,rbu/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,crobinso/libvirt,leilihh/libvirt,novel/fbsd-libvirt,wiedi/libvirt,datto/libvirt,eskultety/libvirt,datto/libvirt,jardasgit/libvirt,jfehlig/libvirt,dumbbell/libvirt,iam-TJ/libvirt,rbu/libvirt,siboulet/libvirt-openvz,fabianfreyer/libvirt,rmarwaha/libvirt,foomango/libvirt,trainstack/libvirt,jfehlig/libvirt,nertpinx/libvirt,olafhering/libvirt,elmarco/libvirt,taget/libvirt,nertpinx/libvirt,crobinso/libvirt,leilihh/libvirt,emaste/libvirt,jardasgit/libvirt,soulxu/libvirt-xuhj,VenkatDatta/libvirt,eskultety/libvirt,cbosdo/libvirt,usc-isi/libvirt,libvirt/libvirt,novel/fbsd-libvirt,rmarwaha/libvirt1,emaste/libvirt,novel/fbsd-libvirt,leilihh/libvirt,novel/fbsd-libvirt,VenkatDatta/libvirt,dumbbell/libvirt,rmarwaha/libvirt,agx/libvirt,usc-isi/libvirt,zhlcindy/libvirt-1.1.4-maintain,rmarwaha/libvirt1,trainstack/libvirt,siboulet/libvirt-openvz,jeckersb/libvirt,jardasgit/libvirt,cbosdo/libvirt,emaste/libvirt,fabianfreyer/libvirt,kantai/libvirt-vfork,danwent/libvirt-ovs,fabianfreyer/libvirt,usc-isi/libvirt,warewolf/libvirt,shugaoye/libvirt,kantai/libvirt-vfork,zhlcindy/libvirt-1.1.4-maintain,cbosdo/libvirt,wiedi/libvirt,zippy2/libvirt,wiedi/libvirt,siboulet/libvirt-openvz,danwent/libvirt-ovs,jfehlig/libvirt,siboulet/libvirt-openvz,trainstack/libvirt,dumbbell/libvirt,bjzhang/libvirt,zhlcindy/libvirt-1.1.4-maintain,siboulet/libvirt-openvz,jardasgit/libvirt,wiedi/libvirt,andreabolognani/libvirt,elmarco/libvirt,foomango/libvirt,warewolf/libvirt,olafhering/libvirt,jeckersb/libvirt,warewolf/libvirt,jeckersb/libvirt