ws: refactor, bug fixes, improvements (#155)

- split swarm worker into two modules
- split socket worker into two modules
- keep track of which offers peers have sent and only allow matching
answers
- always clean up after closing connection
- use channel for telling connections to close
- move some logic into new ConnectionRunner struct
- use slotmap for connection reference storage
- fix double counting of error responses
- actually close connections that take too long to send responses to
- remove announced_info_hashes entry on AnnounceEvent::Stopped

crates/ws/Cargo.toml

@@ -38,6 +38,7 @@ futures-rustls = "0.24"
 glommio = "0.8"
 hashbrown = { version = "0.14", features = ["serde"] }
 httparse = "1"
+indexmap = "2"
 log = "0.4"
 metrics = { version = "0.21", optional = true }
 metrics-util = { version = "0.15", optional = true }
@@ -50,6 +51,7 @@ rustls-pemfile = "1"
 serde = { version = "1", features = ["derive"] }
 signal-hook = { version = "0.3" }
 slab = "0.4"
+slotmap = "1"
 socket2 = { version = "0.5", features = ["all"] }
 tungstenite = "0.20"