History of Swarm::new 2 changes

In crates/backdrop/src/swarm.rs, lines 45–86 on v0.6.0. 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 45,86:crates/backdrop/src/swarm.rs.