docs: added libvirt-announce to contact page
docs: added libvirt-announce to contact page

Also added explicit links to the subscription and
archive pages for the user and developer mailing
lists.

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