Merge branch 'develop' into freebsd

config/config.go

@@ -12,7 +12,7 @@ var v = validator.New()
 func init() {
 	if err := v.RegisterValidation("iface", func(fl validator.FieldLevel) bool {
 		name, ok := fl.Field().Interface().(string)
-		if ok {
+		if ok && name != "" {
 			ifaces, err := net.Interfaces()
 			if err != nil {
 				log.Printf("error getting interfaces: %v", err)
@@ -60,6 +60,10 @@ type Peer struct {
 }
 
 func (p Peer) GetLocalHost() string {
+	if p.LocalHost == "" {
+		return ""
+	}
+
 	if err := v.Var(p.LocalHost, "ip"); err == nil {
 		return p.LocalHost
 	}