virsh: Remove redundant optional option for cmdHelp
virsh: Remove redundant optional option for cmdHelp

Remove the optional option "group", as cmdHelp should accepts
only one option ("virsh help" supports both command and command
group now, and user rarely uses the options, so it doesn't matter
much for it being longer, :-)

* tools/virsh.c

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