Increase --select-file upper bound to 1m for torrent containing lots of files

src/OptionHandlerFactory.cc

@@ -1708,7 +1708,7 @@ std::vector<OptionHandler*> OptionHandlerFactory::createOptionHandlers()
                       (PREF_SELECT_FILE,
                        TEXT_SELECT_FILE,
                        NO_DEFAULT_VALUE,
-                       1, 65535));
+                       1, 1_m));
     op->addTag(TAG_BITTORRENT);
     op->addTag(TAG_METALINK);
     op->setInitialOption(true);