changed default timestamp format

Author: onotelli

src/formatter.cpp

@@ -162,7 +162,7 @@ void parser::init_parse_elements()
 	elements["session.requests"] = pelem(new keyword_optional_params<handler_factory_t_arg<string, session_request_counter>>(_default_not_found));
 
 	elements["request"] = pelem(new keyword_arg<string, regex_handler_factory_t<regex_handler_all_request>>(string(".*")));
-	elements["request.timestamp"] = pelem(new keyword_arg_and_optional_params<handler_factory_t_arg2<string, string, request_timestamp_handler>>("%D %T", _default_not_found));
+	elements["request.timestamp"] = pelem(new keyword_arg_and_optional_params<handler_factory_t_arg2<string, string, request_timestamp_handler>>("%Y-%m-%d %T", _default_not_found));
 	elements["request.timestamp2"] = pelem(new keyword_optional_params<handler_factory_t_arg<string, request_timestamp_handler2>>(_default_not_found));
 	elements["request.time"] = pelem(new keyword_optional_params<handler_factory_t_arg<string, request_time_handler>>(_default_not_found));
 	elements["request.size"] = pelem(new keyword<handler_factory_t<request_size_handler>>());