push skipped any node whose declaration composed to zero resources. A
node that HELD something before — the broker opening a placement gave
an adopted node, say — then kept it forever: the empty declaration that
would drop it was never sent, and the node's own heartbeat re-applied
the stale resource with no way for the mesh to say it is gone. Now the
empty declaration is sent; the host drops what the mesh owned and keeps
what it found. A node that never held anything applies it as a no-op.
Surfaced on ace: the foundation-opening fix (#74) removed its only
resource, and the correction could not reach it until this.
jschoubben