cmd/swarm: Add --httpaddr flag (#14475)

Fixes #14474.

Signed-off-by: Lewis Marshall <lewis@lmars.net>

swarm/api/config.go

@@ -32,7 +32,8 @@ import (
 )
 
 const (
-	port = "8500"
+	DefaultHTTPListenAddr = "127.0.0.1"
+	DefaultHTTPPort       = "8500"
 )
 
 var (
@@ -48,12 +49,13 @@ type Config struct {
 	*network.HiveParams
 	Swap *swap.SwapParams
 	*network.SyncParams
-	Path      string
-	Port      string
-	PublicKey string
-	BzzKey    string
-	EnsRoot   common.Address
-	NetworkId uint64
+	Path       string
+	ListenAddr string
+	Port       string
+	PublicKey  string
+	BzzKey     string
+	EnsRoot    common.Address
+	NetworkId  uint64
 }
 
 // config is agnostic to where private key is coming from
@@ -76,7 +78,8 @@ func NewConfig(path string, contract common.Address, prvKey *ecdsa.PrivateKey, n
 		HiveParams:    network.NewHiveParams(dirpath),
 		ChunkerParams: storage.NewChunkerParams(),
 		StoreParams:   storage.NewStoreParams(dirpath),
-		Port:          port,
+		ListenAddr:    DefaultHTTPListenAddr,
+		Port:          DefaultHTTPPort,
 		Path:          dirpath,
 		Swap:          swap.DefaultSwapParams(contract, prvKey),
 		PublicKey:     pubkeyhex,