build: drop need for VIR_DOMAIN_DEBUG0()
build: drop need for VIR_DOMAIN_DEBUG0()

This one's tricker than the VIR_DEBUG0() removal, but the end
result is still C99 compliant, and reasonable with enough comments.

* src/libvirt.c (VIR_ARG10, VIR_HAS_COMMA)
(VIR_DOMAIN_DEBUG_EXPAND, VIR_DOMAIN_DEBUG_PASTE): New macros.
(VIR_DOMAIN_DEBUG): Rewrite to handle one argument, moving
multi-argument guts to...
(VIR_DOMAIN_DEBUG_1): New macro.
(VIR_DOMAIN_DEBUG0): Rename to VIR_DOMAIN_DEBUG_0.

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