Consider dir info to have changed when the bridges change

Otherwise, we won't realize that we haven't got enough bridge
information to build circuits.  Part of a fix for ticket 29875.

src/app/config/config.c

@@ -2412,7 +2412,8 @@ options_act(const or_options_t *old_options)
     if (!bool_eq(directory_fetches_dir_info_early(options),
                  directory_fetches_dir_info_early(old_options)) ||
         !bool_eq(directory_fetches_dir_info_later(options),
-                 directory_fetches_dir_info_later(old_options))) {
+                 directory_fetches_dir_info_later(old_options)) ||
+        !config_lines_eq(old_options->Bridges, options->Bridges)) {
       /* Make sure update_router_have_minimum_dir_info() gets called. */
       router_dir_info_changed();
       /* We might need to download a new consensus status later or sooner than