multi: add testnet4 support

lnrpc/lightning.pb.go

@@ -6265,8 +6265,8 @@ type GetInfoResponse struct {
 	SyncedToChain bool `protobuf:"varint,9,opt,name=synced_to_chain,json=syncedToChain,proto3" json:"synced_to_chain,omitempty"`
 	// Whether we consider ourselves synced with the public channel graph.
 	SyncedToGraph bool `protobuf:"varint,18,opt,name=synced_to_graph,json=syncedToGraph,proto3" json:"synced_to_graph,omitempty"`
-	// Whether the current node is connected to testnet. This field is
-	// deprecated and the network field should be used instead
+	// Whether the current node is connected to testnet or testnet4. This field is
+	// deprecated and the network field should be used instead.
 	//
 	// Deprecated: Marked as deprecated in lightning.proto.
 	Testnet bool `protobuf:"varint,10,opt,name=testnet,proto3" json:"testnet,omitempty"`

lnrpc/lightning.proto

@@ -2008,8 +2008,8 @@ message GetInfoResponse {
     bool synced_to_graph = 18;
 
     /*
-    Whether the current node is connected to testnet. This field is
-    deprecated and the network field should be used instead
+    Whether the current node is connected to testnet or testnet4. This field is
+    deprecated and the network field should be used instead.
     */
     bool testnet = 10 [deprecated = true];
 

lnrpc/lightning.swagger.json

@@ -5196,7 +5196,7 @@
         },
         "testnet": {
           "type": "boolean",
-          "title": "Whether the current node is connected to testnet. This field is\ndeprecated and the network field should be used instead"
+          "description": "Whether the current node is connected to testnet or testnet4. This field is\ndeprecated and the network field should be used instead."
         },
         "chains": {
           "type": "array",