udp2log on fluorine: relay MW errors to vanadium

I have a ready setup on vanadium for munging UDP log streams. I don't think it
would be too hard to do some minimal batching and tallying of exceptions and
produce reports.

vanadium does not have a public IP, and anyhow I know better than to expose
this data publicly. I just want to make sure that this won't compromise the
reliability of the primary filter on fluorine which writes the logs to disk.

Change-Id: I1632a6b19791895bc5eae3a5f2b69550f7ae17e4