Send Init message immediately after handshake even if not initiator

We were waiting for the initiator, but the spec doesn't guarantee that they will send Init first, so we might theoretically wait forever.

Also, lnprototest expects this behavior.

Author: devrandom

lightning/src/ln/peer_handler.rs

@@ -233,7 +233,6 @@ enum InitSyncTracker{
 
 struct Peer {
 	channel_encryptor: PeerChannelEncryptor,
-	outbound: bool,
 	their_node_id: Option<PublicKey>,
 	their_features: Option<InitFeatures>,
 
@@ -465,7 +464,6 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, L: Deref> PeerManager<D
 		let mut peers = self.peers.lock().unwrap();
 		if peers.peers.insert(descriptor, Peer {
 			channel_encryptor: peer_encryptor,
-			outbound: true,
 			their_node_id: None,
 			their_features: None,
 
@@ -502,7 +500,6 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, L: Deref> PeerManager<D
 		let mut peers = self.peers.lock().unwrap();
 		if peers.peers.insert(descriptor, Peer {
 			channel_encryptor: peer_encryptor,
-			outbound: false,
 			their_node_id: None,
 			their_features: None,
 
@@ -744,6 +741,9 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, L: Deref> PeerManager<D
 									peer.pending_read_is_header = true;
 									peer.their_node_id = Some(their_node_id);
 									insert_node_id!();
+									let features = InitFeatures::known();
+									let resp = msgs::Init { features };
+									self.enqueue_message(&mut peers.peers_needing_send, peer, peer_descriptor.clone(), &resp);
 								},
 								NextNoiseStep::NoiseComplete => {
 									if peer.pending_read_is_header {
@@ -854,12 +854,6 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, L: Deref> PeerManager<D
 					return Err(PeerHandleError{ no_connection_possible: true }.into());
 				}
 
-				if !peer.outbound {
-					let features = InitFeatures::known();
-					let resp = msgs::Init { features };
-					self.enqueue_message(peers_needing_send, peer, peer_descriptor.clone(), &resp);
-				}
-
 				self.message_handler.route_handler.sync_routing_table(&peer.their_node_id.unwrap(), &msg);
 
 				self.message_handler.chan_handler.peer_connected(&peer.their_node_id.unwrap(), &msg);