Updated shodan_search for new API

Updated to support new API, domain, and HTTPS.

Shodan has recently added new domains, new API, and everything
is now over HTTPS. Optional DB reporting has been update so it
can be used as input to RHOSTS for other modules.
again, not your fault, but nil? is almost never required, it can always be re-written in a manner more pleasing to the Ruby Gods ;)  This line could be next unless(results[i] and results[i]['matches'])