autopilot/multi: replace PubKey -> NodeKey on directive

autopilot/interface.go

@@ -85,10 +85,10 @@ type ChannelGraph interface {
 // AttachmentHeuristic. It details to which node a channel should be created
 // to, and also the parameters which should be used in the channel creation.
 type AttachmentDirective struct {
-	// PeerKey is the target node for this attachment directive. It can be
+	// NodeKey is the target node for this attachment directive. It can be
 	// identified by its public key, and therefore can be used along with
 	// a ChannelOpener implementation to execute the directive.
-	PeerKey *btcec.PublicKey
+	NodeKey *btcec.PublicKey
 
 	// NodeID is the serialized compressed pubkey of the target node.
 	NodeID NodeID