The previous implementation of using the --allow option in rad id update would be an absolute list, rather than additive. That is, if there were existing DIDs not passed in via --allow then they would be remove.

Change this behaviour to check the existing value of the document’s allow list, and add to it if --allow is specified.

To enable the user to also remove a DID, the --disallow option is also added.

The correct usage of these options is improved by checking the validity of the --visibility option being used, the current state of the repository’s privacy, and the use of the --allow and --disallow options.

Changes:

• Error if disallow and allow are not disjoint
• Improve test to show off use of multiple --allow and --disallow

Small CLI output edits.