MT#55283 skip unparsed flags objects

The parser currently relies on the appropriate parsing functions
(dict_iter, list_iter) to be called to advance into and back out of any
sub-objects containd within the flags string. However, if an unknown key
is encountered, no parsing functions would be invoked, resulting in the
parser not skipping over the sub-object and subsequently a stray error
message in the log. Work around this by detecting unparsed objects and
then using a dummy list_iter to return to a good parsing position.

Change-Id: I908aff8b9be8d12644a9faea0dcf3bf3535faf32

daemon/control_ng_flags_parser.c

@@ -224,6 +224,8 @@ static bool rtpp_dict_iter(const ng_parser_t *parser, rtpp_pos *pos,
 			break; // nothing left
 
 		callback(parser, &key, pos, arg);
+		if (rtpp_is_dict_list(pos))
+			rtpp_list_iter(parser, pos, NULL, NULL, NULL);
 		if (end)
 			break;
 		goto next;
@@ -434,6 +436,8 @@ generic:
 		else {
 			rtpp_pos pos = { .cur = val, .remainder = remainder };
 			call_ng_main_flags(&dummy_parser, &key, &pos, out);
+			if (rtpp_is_dict_list(&pos))
+				rtpp_list_iter(&dummy_parser, &pos, NULL, NULL, NULL);
 			remainder = pos.remainder;
 		}