Provide a way to mark a request as "sensitive"

[skyellin]

Requests containing sensitive information are sometimes logged, either because exceptions are thrown or due to normal debug logging. We should provide a "sensitive" configuration option that prevents request headers, body, and response body from being logged.

Optionally, we can provide a mechanism to more specifically prevent the logging of particular fields.

[hmoragregaCMP]

I like the idea of tweaking logging, be able to disable (or enable) logging per each request type