Actually use DEBUG env var for multicast ipv4 specs.
Actually use DEBUG env var for multicast ipv4 specs.

EmuxEvans/david,Miradorn/david,Miradorn/david,EmuxEvans/david,Miradorn/david,EmuxEvans/david,Miradorn/david,nning/david,nning/david,nning/david,Miradorn/david,nning/david,EmuxEvans/david,EmuxEvans/david,nning/david