Dive to validate config structs

[BruceMacD]

In order for all config fields to be validated on initialization the validation needs these dive flags on fields.

• Wrote appropriate unit tests
• Considered security implications of the change
• Updated associated docs where necessary
• Updated associated configuration where necessary
• Change is backwards compatible if it needs to be (user can upgrade without manual steps?)
• Nothing sensitive logged

[jmorganca]

Great catch! 💯