History of announce 3 changes

In crates/hub/src/swarm.rs, lines 105–143 on v0.9.24. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 105,143:crates/hub/src/swarm.rs.