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diff --git a/lisp/net/zone-mode.el b/lisp/net/zone-mode.el
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-;;; zone-mode.el --- major mode for editing DNS zone files
-
-;; Copyright (C) 1998, 2002, 2003, 2004, 2005,
-;;   2006 Free Software Foundation, Inc.
-
-;; Author: John Heidemann <[email protected]>
-;; Keywords: DNS, languages
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING.  If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
-
-;;; Commentary:
-
-;;;
-;;; See the comments in ``define-derived-mode zone-mode''
-;;; (the last function in this file)
-;;; for what this mode is and how to use it automatically.
-;;;
-
-;;;
-;;; Credits:
-;;; Zone-mode was written by John Heidemann <[email protected]>,
-;;; with bug fixes from Simon Leinen <[email protected]>.
-;;;
-
-;;; Code:
-
-(defun zone-mode-update-serial ()
-  "Update the serial number in a zone."
-  (interactive)
-  (save-excursion
-    (goto-char (point-min))
-    (while (re-search-forward "\\b\\([0-9]+\\)\\([0-9][0-9]\\)\\([ \t]+;[ \t]+[Ss]erial\\)" (point-max) t)
-      (let* ((old-date (match-string 1))
-	     (old-seq (match-string 2))
-	     (old-seq-num (string-to-number (match-string 2)))
-	     (old-flag (match-string 3))
-	     (cur-date (format-time-string "%Y%m%d"))
-	     (new-seq
-	      (cond
-	       ((not (string= old-date cur-date))
-		"00") ;; reset sequence number
-	       ((>= old-seq-num 99)
-		(error "Serial number's sequence cannot increment beyond 99"))
-	       (t
-		(format "%02d" (1+ old-seq-num)))))
-	     (old-serial (concat old-date old-seq))
-	     (new-serial (concat cur-date new-seq)))
-	(if (string-lessp new-serial old-serial)
-	    (error "Serial numbers want to move backwards from %s to %s" old-serial new-serial)
-	  (replace-match (concat cur-date new-seq old-flag) t t))))))
-
-;;;###autoload
-(defun zone-mode-update-serial-hook ()
-  "Update the serial number in a zone if the file was modified."
-  (interactive)
-  (if (buffer-modified-p (current-buffer))
-      (zone-mode-update-serial))
-  nil ;; so we can run from write-file-hooks
-  )
-
-(defvar zone-mode-syntax-table nil
-  "Zone-mode's syntax table.")
-
-(defun zone-mode-load-time-setup ()
-  "Initialize `zone-mode' stuff."
-  (setq zone-mode-syntax-table (make-syntax-table))
-  (modify-syntax-entry ?\; "<" zone-mode-syntax-table)
-  (modify-syntax-entry ?\n ">" zone-mode-syntax-table))
-
-;;;###autoload
-(define-derived-mode zone-mode fundamental-mode "zone"
-  "A mode for editing DNS zone files.
-
-Zone-mode does two things:
-
-	- automatically update the serial number for a zone
-		when saving the file
-
-	- fontification"
-
-  (add-hook 'write-file-functions 'zone-mode-update-serial-hook nil t)
-
-  (if (null zone-mode-syntax-table)
-      (zone-mode-load-time-setup)) ;; should have been run at load-time
-
-  ;; font-lock support:
-  (set-syntax-table zone-mode-syntax-table)
-  (make-local-variable 'comment-start)
-  (setq comment-start ";")
-  (make-local-variable 'comment-start-skip)
-  ;; Look within the line for a ; following an even number of backslashes
-  ;; after either a non-backslash or the line beginning.
-  (setq comment-start-skip "\\(\\(^\\|[^\\\\\n]\\)\\(\\\\\\\\\\)*\\);+[ \t]*")
-  (make-local-variable 'comment-column)
-  (setq comment-column 40)
-  (make-local-variable 'font-lock-defaults)
-  (setq font-lock-defaults
-	'(nil nil nil nil beginning-of-line)))
-
-(zone-mode-load-time-setup)
-
-(provide 'zone-mode)
-
-;;; arch-tag: 6a2940ef-fd4f-4de7-b979-b027b09821fe
-;;; zone-mode.el ends here