Adding ability to read/write Permission Configs and cli to access them

- Added the ability to set/list/remove permission configurations from prefixes.
- Most of this was a mimic of what Spencer wrote for the zone configurations.
- Also consolidated some of the repeated code where I could.

Once this is merged, I'll create a similar treatment for Accounting Configurations.
I think better leave leave it as a const for the moment. I'd rather have it codified somewhere other than "0" explicitly in the various places it's used.

I'm trying hard to not add global settings. I find having reams of settings for which most users have no idea as to effect or purpose is a bad place to end up.