## v2.2.0 (2021-06-05)
- Actor Identity and Group Iteration
- Rules can store =g<scene>+<actor> or =g<scene>+<actor>@<xsdomain> attributes
- Get an a2act_t Actor Identity as part of access_comm() and access_document()
- This functions as a local alias <scene>+<actor>@<xsdomain> for a Remote Identity
- Groups see this local alias as <group>+<member>@<xsdomain> but are still similar
- Group Iteration yields the reverse mapping, namely a delivery address per group member
This completes the plan initiated with v2.0.0,
- 2.0.0 ("Identity, Selector, Iterator")
- 2.1.0 ("Access Control")
- 2.2.0 ("Group, Identity Mapping")