Description:
if you don't supply a file of hostnames, then it will read from stdin.
You can use new-snmp-hosts
to add RRDs collected by the snmp-collector.
It works by looking for a single OID for each RRD. If the OID exists
on a given host (i.e. it returns data), then the RRD which uses that
data is added to the host. There is currently no way to configure it
except for modifying the code. Complain if you'd actually use such a thing.
It's up to you to discard any you don't want.
If there is no hosts file, it will create one with default
header info. If there is one, it will just append the rrds.
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