rc = url_ciss_tostring (&url, path, len);
rc = url_ciss_tostring (&url, path, len, U_DECODE_PASSWD);
int imap_expand_path (char* path, size_t len){  IMAP_MBOX mx;  ciss_url_t url;  int rc;  if (imap_parse_path (path, &mx) < 0)    return -1;  mutt_account_tourl (&mx.account, &url);  url.path = mx.mbox;  rc = url_ciss_tostring (&url, path, len);  FREE (&mx.mbox);  return rc;}