;; build list from .overview if available
;; We would use nnml-open-nov, except that nnml-nov-buffer-alist is
;; defvoo'd, and we might get called when it hasn't been swapped in.
;; build list from .overview if available
;; We would use nnml-open-nov, except that nnml-nov-buffer-alist is
;; defvoo'd, and we might get called when it hasn't been swapped in.