* Add TCP reachability support on Linux for host resource
This enhances the `host` resource on Linux targets by using netcat
(if installed) to perform TCP reachability checks.
Signed-off-by: Adam Leff <adam@leff.co>
* documentation updates
Signed-off-by: Adam Leff <adam@leff.co>
* Appease rubocop
Signed-off-by: Adam Leff <adam@leff.co>
