Decorate fields with sensitive data

[saad-ali]

Let's consider decorating fields that could contain sensitive data, e.g. secrets, mount flags, etc. in a way that would allow programmaticly excluding the field from logging over the wire.

I believe google may have a proto extension for this, will need to dig around.

[saad-ali]

At a very minimum, on the fields that have sensitive data, we should have a comment on that field (not some where else in the spec) saying it may contain sensitive data and should (must?) not be logged.

[jdef]

#233 ?

[saad-ali]

Yes!!

https://developers.google.com/protocol-buffers/docs/proto#customoptions

[saad-ali]

Closed with #317