bug#24423: Proposal to set buffer not-modified when downloading a sieve script

[TSUCHIYA Masatoshi]

Hi,

Because sieve-edit-script() does not set buffer not-modified when
downloading a sieve script, so, a user including muself cannot
distinguish whether the viewing script is modified or not modified from
the downloaded script on the managesieve server.

If sieve-edit-script() set buffer not-modified when downloading a sieve
script, a user can distinguish its modified status easily.

Therefore, I propose the following patch.

-- 
TSUCHIYA Masatoshi

--- a/lisp/sieve.el
+++ b/lisp/sieve.el
@@ -207,7 +207,8 @@ require \"fileinto\";
              err)
          (setq err (sieve-manage-getscript name newbuf sieve-manage-buffer))
          (switch-to-buffer newbuf)
-         (unless (sieve-manage-ok-p err)
+         (if (sieve-manage-ok-p err)
+             (set-buffer-modified-p nil)
            (error "Sieve download failed: %s" err)))
       (switch-to-buffer (get-buffer-create "template.siv"))
       (insert sieve-template))

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