help: disable NFS protocol connection tracking helper 

end: if [ ${COMMIT_ACTION} = 'DELETE' ]; then
       sudo /opt/vyatta/bin/sudo-users/vyatta-cthelper.pl --enable_nfs=nfs
     else  
       sudo /opt/vyatta/bin/sudo-users/vyatta-cthelper.pl --disable_nfs=nfs
     fi;
