Added loadSecurityConfigOnce (#5792)

weed/util/config.go

@@ -11,6 +11,7 @@ import (
 
 var (
 	ConfigurationFileDirectory DirectoryValueType
+	loadSecurityConfigOnce sync.Once
 )
 
 type DirectoryValueType string
@@ -31,6 +32,12 @@ type Configuration interface {
 	SetDefault(key string, value interface{})
 }
 
+func LoadSecurityConfiguration(){
+	loadSecurityConfigOnce.Do(func() {
+		LoadConfiguration("security", false)
+	})
+}
+
 func LoadConfiguration(configFileName string, required bool) (loaded bool) {
 
 	// find a filer store