Removal of Cleartext Passwords

All passwords, secrets, or keys are not shown in the clear. The software does not emit those passwords in any commands or display them as part of the device configuration.

A new mode of operation for the CLI requires prompting (with no echo) for all passwords, secrets, or keys. The command configure cli password prompting-only controls this mode.

Each CLI command with password arguments is modified to use the new mode (designated with flags="prompting-only" in the CLI syntax attribute specification). Then prompting must be handled by that command.