mit-scheme.git
23 years agoAdd mechanism to allow signalling an error with an arbitrary Scheme
Chris Hanson [Thu, 8 Mar 2001 17:03:35 +0000 (17:03 +0000)]
Add mechanism to allow signalling an error with an arbitrary Scheme
object as an argument.

23 years agoAdd procedures to allocate strings without garbage collecting.
Chris Hanson [Thu, 8 Mar 2001 17:02:02 +0000 (17:02 +0000)]
Add procedures to allocate strings without garbage collecting.

23 years agoAdd support for loading crypto code as shared libraries. This allows
Chris Hanson [Thu, 8 Mar 2001 06:28:54 +0000 (06:28 +0000)]
Add support for loading crypto code as shared libraries.  This allows
a package to be distributed that will work even if the target machine
doesn't have the required libraries installed.  It also allows us to
leave MIT Scheme in Debian's "main" section while still providing
crypto support.

23 years agoIf image directory exists, just use it. This works around a problem
Chris Hanson [Mon, 5 Mar 2001 20:49:02 +0000 (20:49 +0000)]
If image directory exists, just use it.  This works around a problem
that has been causing the build to fail after the image is built but
before the tar files are written.

23 years agoDon't use backquotes.
Chris Hanson [Mon, 5 Mar 2001 20:47:50 +0000 (20:47 +0000)]
Don't use backquotes.

23 years agoOverride default CVS root in order to avoid problems when aarau is
Chris Hanson [Mon, 5 Mar 2001 20:47:34 +0000 (20:47 +0000)]
Override default CVS root in order to avoid problems when aarau is
down.

23 years agoDon't copy precompiled binaries to the output files. Instead unpack
Chris Hanson [Sat, 3 Mar 2001 05:28:05 +0000 (05:28 +0000)]
Don't copy precompiled binaries to the output files.  Instead unpack
the source archive and build the binaries from source.  This is
partially necessary because we want to compile the microcode in a
portable way.  The locally-compiled microcode is dynamically linked to
libraries that might not be available on all target systems.

23 years agoMake tar and zip copies of all documentation archives. Don't generate
Chris Hanson [Sat, 3 Mar 2001 05:25:41 +0000 (05:25 +0000)]
Make tar and zip copies of all documentation archives.  Don't generate
archive for texinfo format; that will now be included in the main
source archive.

23 years agoDon't even try to use <termcap.h>. If we're using ncurses, don't
Chris Hanson [Sat, 3 Mar 2001 05:17:36 +0000 (05:17 +0000)]
Don't even try to use <termcap.h>.  If we're using ncurses, don't
override the definitions in <term.h>, but do supply definitions for
things not defined there.  Add abstract speed_t type, which is defined
in recent <termios.h> files.

23 years agoFix typo in previous edit.
Chris Hanson [Sat, 3 Mar 2001 05:14:10 +0000 (05:14 +0000)]
Fix typo in previous edit.

23 years agoDon't use <termcap.h> for ncurses; instead use <curses.h> and <term.h>
Chris Hanson [Sat, 3 Mar 2001 02:01:21 +0000 (02:01 +0000)]
Don't use <termcap.h> for ncurses; instead use <curses.h> and <term.h>
as specified in the documentation (doh!).  Hopefully this will
eliminate the problem on RH7.

23 years agoRewrite procedure to provide proper ANSI prototype.
Chris Hanson [Sat, 3 Mar 2001 02:00:09 +0000 (02:00 +0000)]
Rewrite procedure to provide proper ANSI prototype.

23 years agoMicrocode sources must include COPYING.
Chris Hanson [Fri, 2 Mar 2001 18:07:32 +0000 (18:07 +0000)]
Microcode sources must include COPYING.

23 years agoAdd extra compile-time flag to specify whether libncurses defines the
Chris Hanson [Fri, 2 Mar 2001 18:03:17 +0000 (18:03 +0000)]
Add extra compile-time flag to specify whether libncurses defines the
`tparam' procedure.

23 years agoRelease notes for 7.5.14.
Chris Hanson [Thu, 1 Mar 2001 18:39:02 +0000 (18:39 +0000)]
Release notes for 7.5.14.

23 years agoWin32 and OS/2 need to include headers for blowfish and md5.
Chris Hanson [Thu, 1 Mar 2001 05:23:58 +0000 (05:23 +0000)]
Win32 and OS/2 need to include headers for blowfish and md5.

23 years agoFix thinko in previous edit.
Chris Hanson [Thu, 1 Mar 2001 04:59:33 +0000 (04:59 +0000)]
Fix thinko in previous edit.

23 years agoAdd support for OpenSSL.
Chris Hanson [Thu, 1 Mar 2001 04:25:57 +0000 (04:25 +0000)]
Add support for OpenSSL.

23 years agoFix compilation errors from previous edit.
Chris Hanson [Thu, 1 Mar 2001 04:25:29 +0000 (04:25 +0000)]
Fix compilation errors from previous edit.

23 years agoDon't use mcrypt for Blowfish; it provides 8-bit CFB and our original
Chris Hanson [Thu, 1 Mar 2001 04:10:42 +0000 (04:10 +0000)]
Don't use mcrypt for Blowfish; it provides 8-bit CFB and our original
code provides 64-bit CFB.

23 years agoAdd support for mcrypt library.
Chris Hanson [Wed, 28 Feb 2001 21:42:44 +0000 (21:42 +0000)]
Add support for mcrypt library.

23 years agoAdd mcrypt support.
Chris Hanson [Wed, 28 Feb 2001 20:05:39 +0000 (20:05 +0000)]
Add mcrypt support.

23 years agoDon't require existence of private Info directory.
Chris Hanson [Wed, 28 Feb 2001 20:03:21 +0000 (20:03 +0000)]
Don't require existence of private Info directory.

23 years agoUpdates to support dynamic linking and mcrypt.
Chris Hanson [Wed, 28 Feb 2001 20:03:03 +0000 (20:03 +0000)]
Updates to support dynamic linking and mcrypt.

23 years agoDon't require existence of private Info directory.
Chris Hanson [Wed, 28 Feb 2001 14:56:28 +0000 (14:56 +0000)]
Don't require existence of private Info directory.

23 years agoUse <termcap.h> to define termcap interface, if available. Some
Chris Hanson [Wed, 28 Feb 2001 14:41:56 +0000 (14:41 +0000)]
Use <termcap.h> to define termcap interface, if available.  Some
recent versions of ncurses appear to have changed the interface.

23 years agoUse <termcap.h> to define termcap interface, if available. Some
Chris Hanson [Wed, 28 Feb 2001 14:41:46 +0000 (14:41 +0000)]
Use <termcap.h> to define termcap interface, if available.  Some
recent versions of ncurses appear to have changed the interface.

23 years agoEliminate unnecessary compiler warnings.
Chris Hanson [Wed, 28 Feb 2001 14:40:45 +0000 (14:40 +0000)]
Eliminate unnecessary compiler warnings.

23 years agoFix standard prompt spacing so that it appears properly in a
Chris Hanson [Tue, 27 Feb 2001 17:49:36 +0000 (17:49 +0000)]
Fix standard prompt spacing so that it appears properly in a
transcript file.

23 years agoFix standard prompt spacing so that it appears properly in a
Chris Hanson [Tue, 27 Feb 2001 17:47:51 +0000 (17:47 +0000)]
Fix standard prompt spacing so that it appears properly in a
transcript file.

23 years agoFix standard prompt spacing so that it appears properly in a
Chris Hanson [Tue, 27 Feb 2001 17:43:24 +0000 (17:43 +0000)]
Fix standard prompt spacing so that it appears properly in a
transcript file.

23 years agoDon't explicitly bind the standard I/O ports; let them all default to
Chris Hanson [Tue, 27 Feb 2001 17:21:01 +0000 (17:21 +0000)]
Don't explicitly bind the standard I/O ports; let them all default to
the cmdl port.

23 years agoChange current I/O ports to default to cmdl port, as is done with
Chris Hanson [Tue, 27 Feb 2001 17:20:35 +0000 (17:20 +0000)]
Change current I/O ports to default to cmdl port, as is done with
other ports.

23 years agoFix initialization of console port: must notice when standard I/O
Chris Hanson [Tue, 27 Feb 2001 17:16:12 +0000 (17:16 +0000)]
Fix initialization of console port: must notice when standard I/O
ports are encapsulations of the console port.

23 years agoFix typo.
Chris Hanson [Mon, 26 Feb 2001 19:15:22 +0000 (19:15 +0000)]
Fix typo.

23 years agoFix logic used to select the default band. It wasn't working
Chris Hanson [Sat, 24 Feb 2001 04:08:28 +0000 (04:08 +0000)]
Fix logic used to select the default band.  It wasn't working
correctly when there was only one band.

23 years agoUse new top-level makefile.
Chris Hanson [Sat, 24 Feb 2001 03:10:21 +0000 (03:10 +0000)]
Use new top-level makefile.

23 years agoInitial revision.
Chris Hanson [Sat, 24 Feb 2001 02:55:18 +0000 (02:55 +0000)]
Initial revision.

23 years agoRelease notes for 7.5.13.
Chris Hanson [Fri, 23 Feb 2001 18:01:25 +0000 (18:01 +0000)]
Release notes for 7.5.13.

23 years agoAdd @dircategory/@direntry so that install-info will work.
Chris Hanson [Fri, 23 Feb 2001 17:47:26 +0000 (17:47 +0000)]
Add @dircategory/@direntry so that install-info will work.

23 years agoTweak punctuation.
Chris Hanson [Fri, 23 Feb 2001 16:16:38 +0000 (16:16 +0000)]
Tweak punctuation.

23 years agoHandle configuration arguments correctly; previously was ignoring
Chris Hanson [Fri, 23 Feb 2001 16:09:29 +0000 (16:09 +0000)]
Handle configuration arguments correctly; previously was ignoring
user's arguments.

23 years agoEliminate some unnecessary logic.
Chris Hanson [Fri, 23 Feb 2001 05:19:03 +0000 (05:19 +0000)]
Eliminate some unnecessary logic.

23 years agoFix typo.
Chris Hanson [Fri, 23 Feb 2001 04:37:15 +0000 (04:37 +0000)]
Fix typo.

23 years agoChange names of Info files so that they have "mit-scheme-" prefix.
Chris Hanson [Fri, 23 Feb 2001 04:36:46 +0000 (04:36 +0000)]
Change names of Info files so that they have "mit-scheme-" prefix.
This allows them to appear in a common shared directory and not
conflict with other programs.

23 years agoMove debian-changelog-mode-hook into "loadef.scm".
Chris Hanson [Tue, 13 Feb 2001 18:45:04 +0000 (18:45 +0000)]
Move debian-changelog-mode-hook into "loadef.scm".

23 years agoFix fencepost error in handling of linkage sections.
Chris Hanson [Mon, 12 Feb 2001 22:32:32 +0000 (22:32 +0000)]
Fix fencepost error in handling of linkage sections.

23 years agoCoerce all coordinate arguments to flonums. This allows ratnums and
Chris Hanson [Sun, 11 Feb 2001 00:09:07 +0000 (00:09 +0000)]
Coerce all coordinate arguments to flonums.  This allows ratnums and
recnums to be used for these arguments.

23 years agoImplement ->FLONUM operation to coerce real numbers to flonums.
Chris Hanson [Sun, 11 Feb 2001 00:08:16 +0000 (00:08 +0000)]
Implement ->FLONUM operation to coerce real numbers to flonums.

23 years agoAdd state to look for line starting with NON-BASE64 character, and
Chris Hanson [Thu, 8 Feb 2001 17:16:05 +0000 (17:16 +0000)]
Add state to look for line starting with NON-BASE64 character, and
stop decoding there.  This works around problem that arises when
mail-processing agents (e.g. mailman) randomly glue text on the end of
a MIME message.

23 years agoForgot to supply buffer in which to do local variable bindings.
Chris Hanson [Tue, 6 Feb 2001 04:30:29 +0000 (04:30 +0000)]
Forgot to supply buffer in which to do local variable bindings.

23 years agoNew code to do Debian changelogs.
Chris Hanson [Tue, 6 Feb 2001 04:19:13 +0000 (04:19 +0000)]
New code to do Debian changelogs.

23 years agoAdd command debian-changelog-mode. Fix bugs; code now appears to work.
Chris Hanson [Mon, 5 Feb 2001 21:48:37 +0000 (21:48 +0000)]
Add command debian-changelog-mode.  Fix bugs; code now appears to work.

23 years agoGrumble. Messing around while debugging problems caused by
Chris Hanson [Mon, 5 Feb 2001 21:47:30 +0000 (21:47 +0000)]
Grumble.  Messing around while debugging problems caused by
incorrectly built bands.

23 years agoReengineer compilation of character set notation.
Chris Hanson [Mon, 5 Feb 2001 20:08:15 +0000 (20:08 +0000)]
Reengineer compilation of character set notation.

23 years agoCHAR-SET:NOT-01 must be first set defined so that error checks on
Chris Hanson [Mon, 5 Feb 2001 19:20:12 +0000 (19:20 +0000)]
CHAR-SET:NOT-01 must be first set defined so that error checks on
other calls will work right.

23 years agoNew code to do Debian changelogs.
Chris Hanson [Mon, 5 Feb 2001 18:55:56 +0000 (18:55 +0000)]
New code to do Debian changelogs.

23 years agoCHAR-SET:NOT-NUMERIC now defined by runtime system.
Chris Hanson [Mon, 5 Feb 2001 18:36:08 +0000 (18:36 +0000)]
CHAR-SET:NOT-NUMERIC now defined by runtime system.

23 years agoCHAR-SET:NOT-GRAPHIC now defined by runtime system.
Chris Hanson [Mon, 5 Feb 2001 18:34:54 +0000 (18:34 +0000)]
CHAR-SET:NOT-GRAPHIC now defined by runtime system.

23 years agoAdd inversions for all standard character sets.
Chris Hanson [Mon, 5 Feb 2001 18:33:19 +0000 (18:33 +0000)]
Add inversions for all standard character sets.

23 years agoUpdate copyright dates.
Chris Hanson [Mon, 5 Feb 2001 18:16:07 +0000 (18:16 +0000)]
Update copyright dates.

23 years agoNew procedure RE-MATCH-EXTRACT-STRING.
Chris Hanson [Mon, 5 Feb 2001 18:14:54 +0000 (18:14 +0000)]
New procedure RE-MATCH-EXTRACT-STRING.

23 years agoAdd procedures to access the user's email-address info.
Chris Hanson [Mon, 5 Feb 2001 17:45:42 +0000 (17:45 +0000)]
Add procedures to access the user's email-address info.

23 years agoAllow names vectors to be sparse. Newer versions of mhash don't use
Chris Hanson [Mon, 29 Jan 2001 19:32:57 +0000 (19:32 +0000)]
Allow names vectors to be sparse.  Newer versions of mhash don't use
the index space densely.

23 years agoKEY<? must be able to handle Edwin variables as well as symbols.
Chris Hanson [Fri, 26 Jan 2001 03:18:51 +0000 (03:18 +0000)]
KEY<? must be able to handle Edwin variables as well as symbols.

23 years agoAllow keys to be Edwin variables too.
Chris Hanson [Thu, 25 Jan 2001 04:44:41 +0000 (04:44 +0000)]
Allow keys to be Edwin variables too.

23 years agoAllow a variable value to be stored in a region as a text property.
Chris Hanson [Thu, 25 Jan 2001 00:16:39 +0000 (00:16 +0000)]
Allow a variable value to be stored in a region as a text property.

23 years agoAdd command imail-toggle-wrap-entity. Change all toggle commands to
Chris Hanson [Thu, 25 Jan 2001 00:15:55 +0000 (00:15 +0000)]
Add command imail-toggle-wrap-entity.  Change all toggle commands to
be under C-c C-t.

23 years agoUse new MIME-BODY-ENCLOSED? and SPECIFIC-PROPERTY-REGION to properly
Chris Hanson [Wed, 24 Jan 2001 22:53:47 +0000 (22:53 +0000)]
Use new MIME-BODY-ENCLOSED? and SPECIFIC-PROPERTY-REGION to properly
compute the buffer region associated with a compound MIME entity.  The
problem is that the IMAIL-MIME-INFO text property associated with
parts of the region will be that of subentities of the entity, so it's
necessary to use the enclosure information to determine this.

23 years agoModify mime-body datatypes to have a pointer to the enclosing entity.
Chris Hanson [Wed, 24 Jan 2001 22:51:43 +0000 (22:51 +0000)]
Modify mime-body datatypes to have a pointer to the enclosing entity.

23 years agoModify mime-body datatypes to have a pointer to the enclosing entity.
Chris Hanson [Wed, 24 Jan 2001 22:51:35 +0000 (22:51 +0000)]
Modify mime-body datatypes to have a pointer to the enclosing entity.

23 years agoGeneralize SPECIFIC-PROPERTY-REGION to allow the user to supply an
Chris Hanson [Wed, 24 Jan 2001 22:42:33 +0000 (22:42 +0000)]
Generalize SPECIFIC-PROPERTY-REGION to allow the user to supply an
equivalence predicate.

23 years agoDon't bind mouse commands to entity regions; just use single global
Chris Hanson [Wed, 24 Jan 2001 19:17:36 +0000 (19:17 +0000)]
Don't bind mouse commands to entity regions; just use single global
binding.

23 years agoWhen attaching MIME info to a region, don't overwrite sub-regions that
Chris Hanson [Wed, 24 Jan 2001 04:29:09 +0000 (04:29 +0000)]
When attaching MIME info to a region, don't overwrite sub-regions that
already have MIME info attached.

23 years agoChange REGION-PUT! to allow it to specify the optional argument to ADD-TEXT-PROPERTY.
Chris Hanson [Wed, 24 Jan 2001 04:28:21 +0000 (04:28 +0000)]
Change REGION-PUT! to allow it to specify the optional argument to ADD-TEXT-PROPERTY.

23 years agoAdd optional argument to ADD-TEXT-PROPERTY that allows it to add the
Chris Hanson [Wed, 24 Jan 2001 04:24:23 +0000 (04:24 +0000)]
Add optional argument to ADD-TEXT-PROPERTY that allows it to add the
property to a region without overwriting any existing sub-regions in
which the property is already bound.  Also: invert sense of predicate
passed to MODIFY-TEXT-PROPERTIES, so that it identifies the intervals
to be modified rather than those not to be modified.

23 years agoFix bug: UW IMAP sometimes returns multiple FETCH responses to a
Chris Hanson [Tue, 23 Jan 2001 05:15:41 +0000 (05:15 +0000)]
Fix bug: UW IMAP sometimes returns multiple FETCH responses to a
FETCH, while we were expecting just one with multiple attributes.  So
if there are multiple responses, merge them.

23 years agoDon't fetch ranges of the form "N:*" when N is greater than the length
Chris Hanson [Mon, 22 Jan 2001 18:38:11 +0000 (18:38 +0000)]
Don't fetch ranges of the form "N:*" when N is greater than the length
of the folder.  This causes an error to be signalled on UW IMAP
(although Cyrus accepts this and returns nothing).

23 years agoChange to add CVS tag to documentation and source files, and to use
Chris Hanson [Mon, 8 Jan 2001 20:52:20 +0000 (20:52 +0000)]
Change to add CVS tag to documentation and source files, and to use
CVS "export" command rather than "checkout".

23 years agoStrip off external-string wrapper before handing it to the microcode.
Chris Hanson [Sat, 6 Jan 2001 19:08:00 +0000 (19:08 +0000)]
Strip off external-string wrapper before handing it to the microcode.

23 years agoUpdate copyright date.
Chris Hanson [Sat, 6 Jan 2001 05:50:05 +0000 (05:50 +0000)]
Update copyright date.

23 years agoImplement new variable imail-summary-auto-select to allow the user to
Chris Hanson [Sat, 6 Jan 2001 05:49:18 +0000 (05:49 +0000)]
Implement new variable imail-summary-auto-select to allow the user to
move around in the summary buffer without automatically selecting
messages.  (Requested by Hal.)

23 years agoImplement new variable imail-summary-auto-select to allow the user to
Chris Hanson [Sat, 6 Jan 2001 05:48:48 +0000 (05:48 +0000)]
Implement new variable imail-summary-auto-select to allow the user to
move around in the summary buffer without automatically selecting
messages.  (Requested by Hal.)

23 years agoIncrement version to reflect recent changes.
Chris Hanson [Sat, 6 Jan 2001 05:46:40 +0000 (05:46 +0000)]
Increment version to reflect recent changes.

23 years agoFix bug: COMTAB-KEY-BINDINGS was signalling error when the given
Chris Hanson [Sat, 6 Jan 2001 05:45:42 +0000 (05:45 +0000)]
Fix bug: COMTAB-KEY-BINDINGS was signalling error when the given
command was bound to a mouse button.  Also, sort the result so that
the simplest kinds of keys appear first; this is usually what's wanted
when reverse-mapping a command for documentation.

23 years agoKludge in support for buttons in place where they might occur for help
Chris Hanson [Sat, 6 Jan 2001 05:37:43 +0000 (05:37 +0000)]
Kludge in support for buttons in place where they might occur for help
commands.  Buttons should really be merged into the special-key
mechanism.

23 years agoTry a different strategy for aliasing upper-case letters to lower-case
Chris Hanson [Sat, 6 Jan 2001 03:00:04 +0000 (03:00 +0000)]
Try a different strategy for aliasing upper-case letters to lower-case
ones: rather than creating explicit aliases, just look up both as
needed.

23 years agoUse new mail-notification mechanism in the notifier. This allows
Chris Hanson [Sat, 6 Jan 2001 02:37:02 +0000 (02:37 +0000)]
Use new mail-notification mechanism in the notifier.  This allows
IMAIL to coexist with the notifier.

23 years agoAdd procedure NOTIFIER:SET-MAIL-STRING! to allow an alternate mail
Chris Hanson [Sat, 6 Jan 2001 02:36:20 +0000 (02:36 +0000)]
Add procedure NOTIFIER:SET-MAIL-STRING! to allow an alternate mail
reader (e.g. IMAIL) to control mail notification.

23 years agoFix typo in ht_delete. Don't unnecessarily try to grow or shrink hash
Chris Hanson [Fri, 5 Jan 2001 20:43:06 +0000 (20:43 +0000)]
Fix typo in ht_delete.  Don't unnecessarily try to grow or shrink hash
table.

23 years agoPass external-string descriptor to substring-move-FOO! rather than
Chris Hanson [Fri, 5 Jan 2001 20:15:29 +0000 (20:15 +0000)]
Pass external-string descriptor to substring-move-FOO! rather than
runtime's wrapper.

23 years agoAdd operations for XSTRING (extended string) objects.
Chris Hanson [Fri, 5 Jan 2001 20:06:57 +0000 (20:06 +0000)]
Add operations for XSTRING (extended string) objects.

23 years agoImplement input port from external string.
Chris Hanson [Thu, 4 Jan 2001 23:24:21 +0000 (23:24 +0000)]
Implement input port from external string.

23 years agoAdd interface to external strings.
Chris Hanson [Thu, 4 Jan 2001 22:27:50 +0000 (22:27 +0000)]
Add interface to external strings.

23 years agoPrimitive names are supposed to be upper-case.
Chris Hanson [Thu, 4 Jan 2001 22:24:15 +0000 (22:24 +0000)]
Primitive names are supposed to be upper-case.

23 years agoImplement external-string mechanism for storing text data outside of
Chris Hanson [Thu, 4 Jan 2001 22:07:45 +0000 (22:07 +0000)]
Implement external-string mechanism for storing text data outside of
Scheme's heap.

23 years agoDocument changes to IMAIL version 1.8.
Chris Hanson [Fri, 29 Dec 2000 04:01:57 +0000 (04:01 +0000)]
Document changes to IMAIL version 1.8.

23 years agoDocument changes to IMAIL version 1.8.
Chris Hanson [Fri, 29 Dec 2000 03:56:18 +0000 (03:56 +0000)]
Document changes to IMAIL version 1.8.

23 years agoReimplement handling of MIME entities. Now all entities are (more or
Chris Hanson [Fri, 29 Dec 2000 03:40:32 +0000 (03:40 +0000)]
Reimplement handling of MIME entities.  Now all entities are (more or
less) well-formed XML, using the keyword "imail-part".  Presentation
of an entity is now consistent, whether it was originally shown inline
or out of line.  New option allows message digests to have their
messages show out of line.  imail-use-original-mime-boundaries
replaced by imail-mime-boundary-style; the latter additionally
supports a boundary that is an SGML comment.

23 years agoReimplement handling of MIME entities. Now all entities are (more or
Chris Hanson [Thu, 28 Dec 2000 05:45:12 +0000 (05:45 +0000)]
Reimplement handling of MIME entities.  Now all entities are (more or
less) well-formed XML, using the keyword "imail-part".  Presentation
of an entity is now consistent, whether it was originally shown inline
or out of line.  New option allows message digests to have their
messages show out of line.  imail-use-original-mime-boundaries
replaced by imail-mime-boundary-style; the latter additionally
supports a boundary that is an SGML comment.