add parameters for verified_host_names and unverified_host_names
the 'host_name' field is deprecated, lets add two search parameters for the new fields recently added:
and lets deprecate the host_name parameter in addition to the host_name field.
context: people can then use the verified_host_names parameter to search for all their relays in a way that is less vulnerable to attacks where a random operator injects himself into the result set. https://github.com/neelchauhan/FamilyGenerator
The implementer decides whether these parameters accept single or multiple values.