2001-12-17  Josh Huber  <huber@alum.wpi.edu>

       * ChangeLog: changed coding to buffer-file-coding-system
       * ChangeLog.1: same
       * nnwfm.el: same
       * gnus-smiley.el: same
       * gnus-cite.el: moved -*- magic cookie -*- to Local Variables
       * gnus-delay.el: same
       * gnus-spec.el: same
       * message.el: same
       * mml1991.el: same
       * nnultimate.el: same

The code in the last checkin was inspired by the following person,
noone else:

2001-12-16  Simon Josefsson  <jas@extundo.com>
Inspired by code by Dirk Meyer <dischi@tzi.de>.

2001-12-16  Simon Josefsson  <jas@extundo.com>

* gnus.texi (Saving Articles): Add muttprint.
(Article Commands): Mention muttprint.

2001-12-16  Simon Josefsson  <jas@extundo.com>
Inspired by code by Bernhard Walle <Bernhard.Walle@gmx.de>.

* gnus-sum.el (gnus-summary-muttprint-program): New variable.
(gnus-summary-save-map): Add muttprint.
(gnus-summary-make-menu-bar): Ditto.
(gnus-summary-muttprint): New function.

* gnus-art.el (gnus-summary-pipe-to-muttprint): New function.

2001-12-15  Simon Josefsson  <jas@extundo.com>

* gnus.texi (Virtual Groups): Fix.  From Raymond Scholz
<ray-2001@zonix.de>.

2001-12-15 08:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus.texi, emacs-mime.texi: Fix the header.

2001-12-14 11:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* uudecode.el (uudecode-decode-region-internal): Speedup by using
temporary list instead of buffer.

* mm-url.el (executable-find): autoload.

2001-12-12  Pavel Jan\e,Bm\e(Bk  <Pavel@Janik.cz>

* gnus-mlspl.el (gnus-group-split-fancy): Doc fix (add reference
to variable, follow doc-string conventions).

2001-12-13  Josh Huber  <huber@alum.wpi.edu>

      * gnus-cus.el (gnus-extra-topic-parameters): added topic parameter
      subscribe-level
      * gnus-topic.el (gnus-subscribe-topics): use it.

2001-12-13 22:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-msg.el (gnus-summary-mail-forward): Forward all marked
messages. (A small patch with indentation)
From Sean Neakums <sneakums@zork.net>.

* gnus-uu.el (gnus-uu-grab-articles): Set gnus-current-article to
nil after shooting down the gnus-original-article-buffer.

2001-12-13 20:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* uudecode.el (uudecode-use-external): New.
(uudecode-decode-region): Automatically detect external program.

* binhex.el (binhex-use-external): New.
(binhex-decode-region-internal): New.
(binhex-decode-region): Automatically detect external program.

* mm-uu.el (mm-uu-decode-function):
(mm-uu-binhex-decode-function): Use them.

2001-12-12  Simon Josefsson  <jas@extundo.com>

* nnvirtual.el (nnvirtual-always-rescan)
(nnvirtual-component-regexp): Fix doc.

* nnoo.el (defvoo): Add doc to defvoo variables.

* nnml.el (nnml-directory, nnml-active-file)
(nnml-newsgroups-file, nnml-get-new-mail, nnml-nov-is-evil)
(nnml-marks-is-evil, nnml-filenames-are-evil)
(nnml-prepare-save-mail-hook, nnml-inhibit-expiry): Fix doc.

* nnmh.el (nnmh-directory, nnmh-get-new-mail)
(nnmh-prepare-save-mail-hook, nnmh-be-safe): Fix doc.
(nnmh-possibly-change-directory): Use `nnheader-report' instead of
`error'.

* nnmbox.el (nnmbox-mbox-file, nnmbox-active-file)
(nnmbox-get-new-mail, nnmbox-prepare-save-mail-hook):

* nnfolder.el (nnfolder-directory, nnfolder-active-file)
(nnfolder-newsgroups-file, nnfolder-get-new-mail)
(nnfolder-save-buffer-hook, nnfolder-inhibit-expiry)
(nnfolder-nov-is-evil, nnfolder-marks-is-evil): Fix doc.

* nnbabyl.el (nnbabyl-mbox-file, nnbabyl-active-file)
(nnbabyl-get-new-mail, nnbabyl-prepare-save-mail-hook): Fix doc.

* imap.el, nnimap.el: Fix indentation.

* gnus-sieve.el (gnus-sieve-article-add-rule): Autoload it.

texi/ChangeLog addition:

2001-12-12  Didier Verna  <didier@lrde.epita.fr>

* gnus.texi (Misc Group Stuff): advertise `gnus-group-news'.
* gnus.texi (Summary Mail Commands): advertise
`gnus-summary-news-other-window'.

lisp/ChangeLog addition:

2001-12-12  Didier Verna  <didier@xemacs.org>

* gnus-msg.el (gnus-group-news): New function.
* gnus-group.el (gnus-group-mode-map): bind it to `i'.
* gnus-group.el (gnus-group-make-menu-bar): add a menu item for it.
* gnus-salt.el (gnus-carpal-group-buffer-buttons): add a button
for it.
* gnus-msg.el (gnus-summary-news-other-window): New function.
* gnus-msg.el ((gnus-summary-send-map "S" gnus-summary-mode-map)):
bind it to `i'.
* gnus-sum.el (gnus-summary-mode-map): bind it to `i'.
* gnus-sum.el (gnus-summary-make-menu-bar): add a menu item for it.
* gnus-salt.el (gnus-carpal-summary-buffer-buttons): add a button
for it (called with a prefix).
* gnus-msg.el (gnus-configure-posting-styles): add an optional
group-name argument.
* gnus-msg.el (gnus-setup-message): use it.

2001-12-12 00:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-sum.el (gnus-summary-show-article): Fix doc.

2001-12-10 17:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* mml.el (mime-to-mml): Remove Content-Disposition too.

(Advanced Scoring Examples): Clarify that the
examples are rules, not complete score files.

Code cleanup.  Fix a bug with "/copy".  From Frank
Schmitt <ich@Frank-Schmitt.net>.

2001-12-09 08:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-sum.el (gnus-summary-buffer-name): Decode group name.
* gnus-group.el (gnus-group-name-decode): Decode unibyte
strings only.
From TSUCHIYA Masatoshi <tsuchiya@namazu.org>

2001-12-09  Nevin Kapur  <nevin@jhu.edu>

* gnus.texi (Expiring Mail): Add.

2001-12-08  Nevin Kapur  <nevin@jhu.edu>

* nnmail.el (nnmail-fancy-expiry-targets): New variable.
(nnmail-fancy-expiry-target): Use it.
Suggestions from Simon Josefsson <jas@extundo.com>.

2001-12-07 14:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-sum.el (gnus-summary-show-article): Recount lines if not exist.

2001-12-07 10:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* nnwfm.el (nnwfm-create-mapping): Use gnus-url-unhex-string.

* gnus-util.el (gnus-url-unhex-string): Move here.

2001-12-07 09:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* nnrss.el (nnrss-decode-entities-unibyte-string): Use
mm-url-decode-entities-nbsp.

* nnlistserv.el, nnultimate.el, nnwarchive.el, nnweb.el,
webmail.el, nnwfm.el: Use mm-url.

* mm-url.el (mm-url-fetch-form): Move from nnweb.
(mm-url-remove-markup): Move from nnweb.
(mm-url-fetch-simple): Move from webmail.

* nnslashdot.el (nnslashdot-request-post): mm-url-fetch-form.

2001-12-07 01:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-sum.el (gnus-summary-print-truncate-and-quote): New.
(gnus-summary-print-article): Use it.

* gnus-util.el (gnus-replace-in-string): Typo.

2001-12-06 10:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* nnweb.el (nnweb-replace-in-string): Removed.

* gnus-util.el (gnus-replace-in-string): New.
(gnus-mode-string-quote): Use it.

* nnrss.el (nnrss-format-string): Use gnus-replace-in-string.
* nnwfm.el (nnwfm-create-mapping): Ditto.

2001-12-06 01:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* dgnushack.el (dgnushack-compile): nnrss.el and
nnslashdot.el don't depend on nnweb, url, w3.

2001-12-06 01:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* nnrss.el: Use mm-url. Don't depend on nnweb, url, w3.

2001-12-06 00:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* mm-url.el (mm-url-insert-file-contents): Support file:.

2001-12-05 14:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* mm-view.el: Lower case for the description line. Sync from the
Emacs CVS.

2001-12-05 12:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-group.el (gnus-group-find-new-groups): Fix doc.
From:  Stefan Monnier  <monnier@cs.yale.edu>

2001-12-05  Katsumi Yamaoka  <yamaoka@jpl.org>

* mm-view.wl (mm-inline-text): Decode a charset-encoded rich text.

(Splitting in IMAP): Typo.  From Colin Marquardt
<c.marquardt@alcatel.de>.

2001-12-04 08:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* mm-url.el: Require executable.
Suggested by Katsumi Yamaoka <yamaoka@jpl.org>.

2001-12-03 11:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* pop3.el (pop3-munge-message-separator): Only use valid date.
From Michael Welsh Duggan <md5i@cs.cmu.edu>.

* Makefile.in: gnus-load.elc may not be generated.

2001-12-03 10:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* infohack.el (infohack): To process write-protected files safely,
       make this buffer be writable after `find-file'.
From TSUCHIYA Masatoshi  <tsuchiya@namazu.org>

2001-12-03 08:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* Makefile.in: Dependence.

* emacs-mime.texi: Add coding header.

2001-12-03 09:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* mm-url.el: New.
* nnslashdot.el: Use it.
* mm-extern.el (mm-extern-url): Use it.

2001-12-01  Simon Josefsson  <jas@extundo.com>

* gnus.texi (Group Line Specification, Summary Buffer Lines):
Cross reference Positioning Point.

2001-12-01 15:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-sum.el (gnus-summary-save-article): Nix
gnus-display-mime-function and gnus-article-prepare-hook.

* gnus-spec.el (gnus-parse-complex-format): Properly handle %C at
the beginning of lines.
(gnus-complex-form-to-spec): Ditto.

2001-12-01 08:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* message.el (message-make-mft): Fix the m-s-a-file regexp.
From Paul Jarc <prj@po.cwru.edu>.

2001-11-30 21:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* message.el: New variable message-subscribed-address-file;
use it in message-make-mft.  From Paul Jarc <prj@po.cwru.edu>.

2001-11-30 12:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* message.el (message-tab-body-function): Set to nil.
(message-tab): Use text-mode-map or global-map.
Suggested by Kai Gro\e,A_\e(Bjohann  <Kai.Grossjohann@CS.Uni-Dortmund.DE>.

2001-11-30  Simon Josefsson  <jas@extundo.com>

* gnus-agent.el (gnus-agent-fetch-headers): Use gnus-range-add
instead of gnus-union, for speed.  Suggested by Christoph Conrad
<christoph.conrad@gmx.de>.
(gnus-agent-fetch-group-1): Add verbose message.

2001-11-29 12:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-agent.el (gnus-agent-write-active): Make sure sym is a cons
of integers.

(message-tab): Mention `message-tab-body-function' in doc.
Suggested by Karl Eichwalder.

(message-newgroups-header-regexp)
(message-completion-alist, message-tab-body-function): Use
defcustom rather than defvar.

2001-11-28 16:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-uu.el (gnus-uu-save-article): Use #part instead of #mml.

2001-11-28 12:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* nnheader.el (nnheader-find-nov-line): Don't use macro
gnus-delete-line.

* gnus-group.el (gnus-group-name-decode): Defun instead of defsubst.
(gnus-group-name-charset): Ditto.

* gnus-util.el (gnus-buffer-live-p): Ditto.

2001-11-28 11:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* sieve-manage.el (sieve-manage-stream-alist): Backslash before
open parenthesis in doc.
(sieve-manage-authenticator-alist): Typo in doc.
* imap.el (imap-authenticator-alist): Typo in doc.
(imap-stream-alist): Backslash.

2001-11-28 11:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-sum.el (gnus-summary-limit-to-author): Missing arguments.
  Thanks to david.goldberg6@verizon.net (David S. Goldberg)

2001-11-27 14:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-topic.el (gnus-topic-mode): Add LOCAL for add-hook.

* message.el (message-mode): make-local-hook is harmless in Emacs 21.

* gnus-msg.el (gnus-configure-posting-styles): use
make-local-hook. Add LOCAL for add-hook.

2001-11-27  Per Abrahamsen  <abraham@dina.kvl.dk>

* message.el (message-mode): Use `make-local-hook' unless
obsolete.
Patch by Katsumi Yamaoka  <yamaoka@jpl.org>.

2001-11-26  Katsumi Yamaoka  <yamaoka@jpl.org>

* canlock.el: Remove sha1.el and base64.el stuff.

lisp/ChangeLog addition:

2001-11-26  Didier Verna  <didier@xemacs.org>

* nnmbox.el (nnmbox-create-mbox): create the mbox file directory
if needed.

2001-11-21  Katsumi Yamaoka  <yamaoka@jpl.org>

* message.el (message-tamago-not-in-use-p): New function.
(message-strip-forbidden-properties): Use it.

Use parameter "/copy" rather than "copy" for increased
dwimishness for old-time DOS users.  From Frank Schmitt
<ich@Frank-Schmitt.net>.

lisp/ChangeLog addition:

2001-11-26  Didier Verna  <didier@xemacs.org>

* gnus-start.el (gnus-check-first-time-used): only check for
existence of .el[d] files.

2001-11-25 15:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* mm-util.el (mm-coding-system-priorities): Add backslash in the doc.

* message.el (message-setup-1): Clean up mc-*.

2001-11-25 09:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-util.el (gnus-directory-sep-char-regexp): New.
* gnus-score.el (gnus-score-find-bnews): Use it.

add todos.

2001-11-25 09:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus.texi (Limiting): Addition.

2001-11-25 09:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-sum.el (gnus-summary-limit-to-subject): An exclusion version.
(gnus-summary-limit-to-author): Ditto.
(gnus-summary-limit-to-extra): Ditto.
(gnus-summary-find-matching): Support not-matching argument.

(message-wash-subject): Use `insert' rather than
`insert-string', which is deprecated.

2001-11-24  Simon Josefsson  <jas@extundo.com>

* mm-encode.el (mm-encode-content-transfer-encoding): Fix error
message. (Gnus does not "default" to using 8bit for the message,
it default to use 8bit encoding and the user-supplied CTE
value. Calling this behaviour "treating it as 8bit" is perhaps
better.)

2001-11-24  Simon Josefsson  <jas@extundo.com>

* mm-bodies.el (mm-body-encoding): Intern encoding if needed
(compare mm-charset-to-coding-system).

2001-11-23 02:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* canlock.el (canlock-sha1-with-openssl): Use unibyte
buffer. Correctly decode hex.

2001-11-22  Simon Josefsson  <jas@extundo.com>

* sha1.el: Removed. (A FSF copyrighted sha1-el.el file is in
../lisp/).

2001-11-21 01:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus-agent.el (gnus-category-insert-line): Convert category
names to strings.

2001-11-20 21:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* message.el (sha1): eval-and-compile.

2001-11-20  Simon Josefsson  <jas@extundo.com>

* message.el (message-allow-no-recipients): New variable.
(message-send): Use it, customize the prompting when posting to
Gcc/Fcc alone.  From prj@po.cwru.edu (Paul Jarc).

2001-11-20 09:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* mm-util.el (mm-coding-system-priorities): New.
(mm-sort-coding-systems-predicate): New.
(mm-find-mime-charset-region): Resort coding systems if needed.
Suggested by Katsumi Yamaoka <yamaoka@jpl.org>.

lisp/ChangeLog addition:

2001-11-20  Didier Verna  <didier@xemacs.org>

* gnus-group.el (gnus-group-make-help-group): new optional
argument to control the error behavior.
* gnus-start.el (gnus-check-first-time-used): use it to avoid
erroring.

2001-11-19  Simon Josefsson  <jas@extundo.com>

* message.texi (Header Commands, Insertion): Use C-c C-f C-i for
Importance: instead of C-c C-u.  Move to Header Commands from
Insertion. Suggested by Per Abrahamsen <abraham@dina.kvl.dk>.

2001-11-19  Simon Josefsson  <jas@extundo.com>

* message.el (message-mode-map): Use C-c C-f C-i for Importance:
instead of C-c C-u.  Suggested by Per Abrahamsen
<abraham@dina.kvl.dk>.

2001-11-18 08:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* nnfolder.el (nnfolder-read-folder): Use group instead of
nnfolder-current-group.
Suggested by Lorentey Karoly <lorentey@elte.hu>.

2001-11-17  Simon Josefsson  <jas@extundo.com>

* message.el (message-send): Ask user if Fcc/Gcc should be
performed when no other sender was specified.
Suggested by prj@po.cwru.edu (Paul Jarc).

2001-11-17  Simon Josefsson  <jas@extundo.com>

* message.texi (Insertion): Use C-c C-u for Importance: instead of
C-c C-p (used by SC).

2001-11-17  Simon Josefsson  <jas@extundo.com>

* message.el (message-mode, message-mode-map): Use C-c C-u for
Importance: instead of C-c C-p (used by SC).

2001-11-16  Simon Josefsson  <jas@extundo.com>

* message.el (message-insert-importance-high)
(message-insert-importance-low): Save point.

Improve the icons:

2001-11-15  Simon Josefsson  <jas@extundo.com>

* etc/gnus/unimportant.xpm, etc/gnus/important.xpm: New files.

2001-11-16  Simon Josefsson  <jas@extundo.com>

* mail-source.el (mail-source-fetch-imap): Fix BODY.PEEK return
value.

2001-11-16  Per Abrahamsen  <abraham@dina.kvl.dk>

* message.el (message-strip-special-text-properties): New option.
(message-strip-forbidden-properties): Obey it.

2001-11-14  Sam Steingold  <sds@gnu.org>

* gnus-score.el: Fixed some doc strings to properly quote symbols.

2001-11-15  Simon Josefsson  <jas@extundo.com>

* message.texi (Insertion): Add C-c C-p,
message-insert-importance-{low,high}.
(Various Commands): Fix typo.
(Insertion Variables): New section, all variables moved from
Commands->Insertion into this node, Variables->Insertion
Variables.

2001-11-15  Simon Josefsson  <jas@extundo.com>

Support "Importance:" header in Message.

* message.el (message-mode-map): Bind C-c C-p to
`message-insert-or-toggle-importance'
(message-mode-menu): Add message-insert-importance-{high,low}.
(message-insert-importance-high, message-insert-importance-low)
(message-insert-or-toggle-importance): New functions.
(message-tool-bar-map): Add {un,}important.
(message-mode): Doc fix.

2001-11-15  Simon Josefsson  <jas@extundo.com>

* message.el (message-tool-bar-map): Fix attach toolbar tooltip.

* mml.el (mml-menu): Fix toolbar tooltip.

Add Importance:

2001-11-15  Simon Josefsson  <jas@extundo.com>

* etc/gnus/unimportant.xpm, etc/gnus/important.xpm: New files.

2001-11-15 14:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* gnus.texi (Various Summary Stuff): Add gnus-newsgroup-variables.

2001-11-15 14:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* nnfolder.el (nnfolder-save-marks): gnus-prin1 takes one argument.
* nnml.el (nnml-save-marks): Ditto.

* gnus-sum.el (gnus-newsgroup-variables): Fix doc.

2001-11-15  Simon Josefsson  <jas@extundo.com>

* nnml.el (nnml-save-marks):
* nnfolder.el (nnfolder-save-marks): Use `gnus-prin1'.
Suggested by Istvan Marko <mi-gnus@imarko.dhs.org>.

2001-11-15  Per Abrahamsen  <abraham@dina.kvl.dk>

* gnus-art.el (gnus-article-wash-status-strings): Use
`copy-sequence', not `copy-seq'.

2001-11-15 11:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* message.texi (Security): @uref not @url.

2001-11-15  Per Abrahamsen  <abraham@dina.kvl.dk>

* gnus-art.el (gnus-article-wash-status-strings): New constant.
(gnus-gnus-article-wash-status-entry): New function.
(gnus-article-wash-status): Use it.

2001-11-15  Per Abrahamsen  <abraham@dina.kvl.dk>

* sieve.texi (Standards): Changed @samp to @uref.

* message.texi (Security): Changed @code to @uref.

* gnus-faq.texi: Changed a lot of @file to @uref.

* emacs-mime.texi (Standards): Changed @samp to @uref.

2001-11-13  Simon Josefsson  <jas@extundo.com>

* gnus.texi (Article Washing): Add `W s'.

Add Cancel-Locks.
Add verbose documentation on some other features, in particular
   information on how to disable them.

2001-11-13 10:00:00  ShengHuo ZHU  <zsh@cs.rochester.edu>

* mml1991.el: Add coding header.

Add PGP.

2001-11-12  Simon Josefsson  <jas@extundo.com>

* gnus.texi (Security, Using GPG):
* message.texi (Security):
* emacs-mime.texi (MML Definition): Add PGP.

2001-11-12  Simon Josefsson  <jas@extundo.com>

* mml1991.el (mml1991-use, mml1991-function-alist): New variables.
(mml1991-gpg-sign, mml1991-gpg-encrypt): Renamed, from
`mml1991-sign' and `mml1991-encrypt'.
(mml1991-encrypt, mml1991-sign): New glue functions.
(mml1991-mailcrypt-sign, mml1991-mailcrypt-encrypt): New functions.

* mml.el (mml-mode-map): `C-c RET o' map for PGP.
(mml-menu): Add PGP to menu.

* mml-sec.el (top-level): Require mml1991.  Don't require smime.
(mml-sign-alist, mml-encrypt-alist): Add "pgp".
(mml-pgp-sign-buffer, mml-pgp-encrypt-buffer)
(mml-secure-sign-pgp, mml-secure-encrypt-pgp): New glue functions.

* mml2015.el: Mention RFC 3156.

* mml1991.el: New file.  From Sascha Lüdecke <sascha@meta-x.de>.