qemu: Use fd: protocol for migration
qemu: Use fd: protocol for migration

By opening a connection to remote qemu process ourselves and passing the
socket to qemu we get much better errors than just "migration failed"
when the connection is opened by qemu.

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