virsh: Use Env variables for debug level and logfile
virsh: Use Env variables for debug level and logfile

Use variables VIRSH_DEBUG and VIRSH_LOG_FILE for controlling virsh logging.

Signed-off-by: Supriya Kannery <c6dca644ab1b8497a0f872c2b7a4b4b4eef5a5f1@in.ibm.com>

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