Query log coverage

[Darren S.]

Is there a simple way in Unbound to output a query log for each client
query to the resolver? Looking for:

- All cache hits
- All cache misses
- Inclusion of client IP address and query source port

Was looking at `verbosity` option but understood it to indicate that
only level 5 logs client info, and only cache misses in that case. I
have a very low volume deployment and the overhead of query logging
shouldn't be an issue, but it would be ideal if we didn't have to deal
with level 5 logging in the output.

Hoping to avoid dnstap for now as would prefer to stay with native OS
package and no additional dependencies.

--
Darren Spruell
phatbuckett at gmail.com