doc: Add doc for missed options of migrate
doc: Add doc for missed options of migrate

* tools/virsh.pod (add doc for options like "--p2p", "--direct",
"--copy-storage-all", "dname", etc.)

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