Masking Environment Variables in Logs (stdin and stdout)

[yottahmd]

When the output of stdout or stderr contains values identical to environment variables, those values should be replaced with the masking string ******* to prevent exposure of sensitive information.

[ghansham]

I feel we can have additional setting for each environment variable to be masked or not. This will help to put lesser load of string comparisons on server side.
Moreover user may not be interested in masking all the environment variables except the sensitive information. At times, user may be interested in such values for debugging problems as well