Enhancement: Make resetting to defaults reload instead of restart firewalld Reason: Reloading in firewalld should successfully complete the configuration reset, and restarting adds downtime which can be used to open a connection that persists after firewalld has finishes restarting; this connection can be used to bypass firewall rules, since firewalld will not block traffic from active connections. Result: Minimal downtime when using `previous: replaced` Addresses an issue brought up in #140, where due to the restart on resetting to defaults, the feature may not be suitable for production environments.