Update reload_host_config script with iptables rule drop and root credentials caching #554
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This PR has these actions:
Add some commands to drop all previously applied iptables rules (it helps if running in an already setup OS or if the script is run more than once) (for more information, see this doc page)
Add a root credential cache command (to avoid asking for the password in the middle of the workflow)
Add some inline comments to improve code readability and hopefully reduce future maintenance efforts
TIA