refactor: trival changes (#41)

- refactor status code
- log remote addr and time in miliseconds

tests/http.rs

@@ -134,7 +134,7 @@ fn options_dir(server: TestServer) -> Result<(), Error> {
         resp.headers().get("allow").unwrap(),
         "GET,HEAD,PUT,OPTIONS,DELETE,PROPFIND,COPY,MOVE"
     );
-    assert_eq!(resp.headers().get("dav").unwrap(), "1");
+    assert_eq!(resp.headers().get("dav").unwrap(), "1,2");
     Ok(())
 }