Research using reflection for dynamic testing of config struct field members

[atc0005]

This wouldn't be for the config.Validate() method (not likely due to custom validity logic), but rather to help reduce duplication in the validate_test.go file where (mostly due to ignorance) I am duplicating a lot of the checks:

• ensure field member is not nil
• ensure dereferenced field pointer is not of an unacceptable value

If we can dynamically fetch the field names (reflection), we should be able to switch on the type and/or value of each to apply specific checks.

This would come after #161 is worked out and likely after I've done further research.