The first want at the switch skips the record hold only where it changes nothing on the node. A slice differing only in
the bus's user list is marked user-list-only, so no yes waits on it at the switch; any other change at the same
fingerprint is judged as any move, against the declaration's digest.
The assigner holds a move of a module of policy record from the judgement beside its digest, so it is judged by ADR
0377 §3's tests against the composition the node's have names, a held one never taking its place, and written again
when the have changes or a person sets the policy (ADR 0539 clauses 2 and 14). The node-engine's own file
operator-keys, from its setting operator-signers, carries the operator's public keys (clause 3).
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