configfile: fixed inverted logic for config watch

If no options passed, defaults to not watching. The intention for this was to
provide a way to disable watching explicitely. This restores 'watching on by
default' behavior with the ability to disable it selectively.
change ASN lookup to Google Public IPs

which is expected be quite stable
Merge pull request #709 from msimerson/asn-test

change ASN lookup to Google Public IPs
Merge pull request #707 from msimerson/config

configfile: fix inverted logic for config watch
early_talker: add tests

refactor a little for testability and simplicity