With debug logging turned on, we currently log the base64-encoded secret payload. Change the middleware code to redact this. Since the field is called "Data", it requires some context-sensitivity. The URI path is examined to see which route is being invoked. Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com> (cherry picked from commit 3fbc352cbbce06cd3001d6b14b2b1ebcb4d42cd5) Signed-off-by: Andrew Hsu <andrewhsu@docker.com>