Implement callee black- and whitelisting in client

[ecorm]

Implement callee black- and whitelisting, as per the advanced spec.

[ecorm]

Client requirements:

• HELLO.Details.roles.caller.features.callee_blackwhite_listing|bool := true
• CALL.Options.exclude|list
• CALL.Options.eligible|list

There is no other special treatment required by the client.