Bugfixes: Fixes to supervise/unsupervise commands, flag handling and more

This includes some code cleanup by @tranzystorek-io as well as fixes several fundamental issues:

• supervise and unsupervise commands would hang after performing work
• supervise and unsupervise commands would no longer output instructions on what to do after running the command
• supervise and unsupervise commands were not allowing config files to be propagated.

Thanks for using zeronsd. Please remember we are actively swallowing bugs daily!