Merge pull request #3890 from progre/feature/log4js-filename

log4js: add filename argument

log4js/log4js-tests.ts

@@ -71,3 +71,4 @@ log4js.configure({
   }
 });
 
+log4js.configure('file.json', { reloadSecs: 300 });

log4js/log4js.d.ts

@@ -64,6 +64,7 @@ declare module "log4js" {
   export function shutdown(cb: Function): void;
 
   export function configure(config: IConfig, options?: any): void;
+  export function configure(filename: string, options?: any): void;
 
   export function setGlobalLogLevel(level: string): void;
   export function setGlobalLogLevel(level: Level): void;