Added switches to:
- test connections to/from local interfaces if they are included in the hosts parameter. Otherwise they are now ignored, allowing the same host set to be used accross hosts without redundant results in the output.
- set the number of connection attemps - defaults to 5.
- output results as JSON instead of CSV.
- POST results to an URI as a JSON payload, i.e. to get the results into an object DB.
- quiet version and summary output.
- dry-run, resolving endpoints but not testing/connecting to them.