src: don't print interface if sin6_scope_id is 0
An interface with index 0 doesn't make sense and makes
if_indextoname()
to return ENXIO
which crashes the process.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
An interface with index 0 doesn't make sense and makes
if_indextoname()
to return ENXIO
which crashes the process.