(refill-post-command-function):

(refill-post-command-function):
Add `indent-new-comment-line' and `reindent-then-newline-and-indent'
to the list of functions that we should be careful not to undo.
(refill-late-fill-paragraph-function): Remove.
(refill-saved-state): New var.
(refill-mode): Use it to save fill-paragraph-function.
Save also the value of auto-fill-function.