/* Crawl the folder hierarchy rooted at the relative path `dir'. For each
* folder, pass `callback' the folder name (as a path relative to the current
* directory) and `baton'; the callback may direct crawl_folders not to crawl
* its children; see above. */
/* Crawl the folder hierarchy rooted at the relative path `dir'. For each
* folder, pass `callback' the folder name (as a path relative to the current
* directory) and `baton'; the callback may direct crawl_folders not to crawl
* its children; see above. */