1 GNU Wget NEWS -- history of user-visible changes.
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4 2006, 2007, 2008 Free Software Foundation, Inc.
5 See the end for copying conditions.
7 Please send GNU Wget bug reports to <bug-wget@gnu.org>.
9 * Changes in Wget 1.12 (MAINLINE)
11 ** Added support for CSS. This includes:
12 - Parsing links from CSS files, and from CSS content found in HTML
13 style tags and attributes.
14 - Supporting conversion of links found within CSS content, when
15 --convert-links is specified.
16 - Ensuring that CSS files end in the ".css" filename extension,
17 when --convert-links is specified.
19 CSS support in Wget is thanks to Ted Mielczarek
20 <ted.mielczarek@gmail.com>.
22 ** --ask-password option (and associated wgetrc command) added to
23 support password prompts at the console.
25 ** The --input-file option now also handles retrieving links from
28 * Changes in Wget 1.11.4
30 ** Fixed an issue (apparently a regression) where -O would refuse to
31 download when -nc was given, even though the file didn't exist.
33 ** Fixed a situation where Wget could abort with --continue if the
34 remote server gives a content-length of zero when the file exists
37 ** Fixed a crash on some systems, due to Wget casting a pointer-to-long
38 to a pointer-to-time_t.
40 ** Translation updates for Catalan.
42 * Changes in Wget 1.11.3
44 ** Downgraded -N with -O to a warning, rather than an error.
46 ** Translation updates
48 * Changes in Wget 1.11.2
50 ** Fixed a problem in authenticating over HTTPS through a proxy.
51 (Regression in 1.11 over 1.10.2.)
53 ** The combination of -r or -p with -O, which was disallowed in 1.11,
54 has been downgraded to a warning in 1.11.2. (-O and -N, which was never
55 meaningful, is still an error.)
57 ** Further improvements to progress bar displays in non-English locales
58 (too many spaces could be inserted, causing the display to scroll).
60 ** Successive invocations of Wget on FTP URLS, with --no-remove-listing
61 and --continue, was causing Wget to append, rather than replace,
62 information in the .listing file, and thereby download the same files
63 multiple times. This has been fixed in 1.11.2.
65 ** Wget 1.11 no longer allowed ".." to persist at the beginning of URLs,
66 for improved conformance with RFC 3986. However, this behavior presents
67 problems for some FTP setups, and so they are now preserved again, for
70 * Changes in Wget 1.11.1.
72 ** Interrupted downloads no longer result in renaming the file
73 (regression in 1.11 over 1.10.2).
75 ** Progress bar now displays correctly in non-English locales (and a
76 related assertion failure was fixed).
78 ** Wget no longer issues a GET request over HTTP for files it should
79 know it's not going to download (regression in 1.11 over 1.10.2).
81 ** Added option --auth-no-challenge, to support broken pre-1.11
82 authentication-before-server-challenge, which turns out to still be
83 useful for some limited cases.
85 ** Documentation of accept/reject lists in the manual's "Types of
86 Files" section now explains various aspects of their behavior that may
87 be surprising, and notes that they may change in the future.
89 ** Documentation of --no-parents now explains how a trailing slash, or
90 lack thereof, in the specified URL, will affect behavior.
92 * Changes in Wget 1.11.
94 ** Timestamping now uses the value from the most recent HTTP response,
95 rather than the first one it got.
97 ** Authentication information is no longer sent as part of the Referer
98 header in recursive fetches.
100 ** No authentication credentials are sent until a challenge is issued,
101 for improved security. Authentication handling is still not
102 RFC-compliant, as once a Basic challenge has been received, it will
103 assume it can send credentials to any URL at that same host, and not
104 just the ones at or below the original authenticated location.
105 Credentials for Digest authentication are still never saved or issued
106 automatically, and continue to require a challenge for each resource.
108 ** Added --max-redirect option, allowing the user to specify what should
109 be the maximum number of HTTP redirects to follow.
111 ** Wget now supports saving HTTP downloads using file names specified by
112 the `Content-Disposition' header. This is a standard way of specifying
113 the file name used by many web dynamically generated pages. However, the
114 current implementation is inefficient, and known to have bugs. It is
115 EXPERIMENTAL only, and not enabled by default. Use --content-disposition
118 ** The new option `--ignore-case' makes Wget ignore case when
119 matching files, directories, and wildcards. This affects the -X, -I,
120 -A, and -R options, as well as globbing in FTP URLs.
122 ** ETA projection is now displayed in "dot" progress output as well as
123 in the default progress bar. (The dot progress is used by default when
124 logging Wget's output to file using the `-o' option.)
126 ** The "lockable boolean" argument type is no longer supported. It
127 was only used by the passive_ftp .wgetrc setting. If you're running
128 broken scripts or Perl modules that unconditionally specify
129 `--passive-ftp' and your firewall disallows it, you can override them
130 by replacing wget with a script that execs wget "$@" --no-passive-ftp.
132 ** The source code has been migrated to Mercurial. The repositories are
133 available at http://hg.addictivecode.org/. Prior to this, the source
134 code was hosted on Subversion (migrated from the original CVS); you can
135 still get access to older tags and branches for Wget in the Subversion
136 repository at http://addictivecode.org/svn/wget/.
138 * Changes in Wget 1.10.
140 ** Downloading files larger than 2GB, sometimes referred to as "large
141 files", now works on systems that support them. This includes the
142 majority of modern Unixes, as well as MS Windows.
144 ** IPv6 is now supported by Wget. Unlike the experimental code in
145 1.9, this version supports dual-family systems. The new flags
146 `--inet4' and `--inet6' (or `-4' and `-6' for short) force the use of
147 IPv4 and IPv6 respectively. Note that IPv6 support has not yet been
150 ** Microsoft's proprietary "NTLM" method of HTTP authentication is now
151 supported. This authentication method is undocumented and only used
152 by IIS. Note that *proxy* authentication is not supported in this
153 release; you can only authenticate to the target web site.
155 ** Wget no longer truncates partially downloaded files when download
156 has to start over because the server doesn't support Range. Instead,
157 with such servers Wget now simply ignores the data up to the byte
158 where the last attempt left off, and only then continues appending to
159 the file. That way the downloaded file never shrinks, and download
160 retries from servers without support for partial downloads work even
161 when downloading to stdout.
165 *** SSL/TLS downloads now attempt to verify the server's certificate
166 against the recognized certificate authorities. This requires CA
167 certificates to have been installed in a location visible to the
168 OpenSSL library. If this is not the case, you can get the bundle
169 yourself from a source you trust (for example, the bundle extracted
170 from Mozilla available at http://curl.haxx.se/docs/caextract.html),
171 and point Wget to the PEM file using the `--ca-certificate'
172 command-line option or the corresponding `.wgetrc' command.
174 *** Secure downloads now verify that the host name in the URL matches
175 the "common name" in the certificate presented by the server.
177 *** Although the above checks provide more secure downloads, they
178 unavoidably break interoperability with some sites that worked with
179 previous versions, particularly those using self-signed, expired, or
180 otherwise invalid certificates. If you encounter "certificate
181 verification" errors or complaints that "common name doesn't match
182 requested host name" and are convinced of the site's authenticity, you
183 can use `--no-check-certificate' to bypass both checks.
185 *** Talking to SSL/TLS servers over proxies now actually works.
186 Previous versions of Wget erroneously sent GET requests for https
187 URLs. Wget 1.10 utilizes the CONNECT method designed for this
190 *** The SSL/TLS-related options have been redesigned and, for the
191 first time, documented in the manual. The old, undocumented, options
192 are no longer supported.
194 ** Passive FTP is now the default FTP transfer mode. Use
195 `--no-passive-ftp' or specify `passive_ftp = off' in your init file to
196 revert to the old behavior.
198 ** The `--header' option can now be used to override generated
199 headers. For example, `wget --header="Host: foo.bar"
200 http://127.0.0.1' tells Wget to connect to localhost, but to specify
201 "foo.bar" in the `Host' header. In previous versions such use of
202 `--header' lead to duplicate headers in HTTP requests.
204 ** The responses without headers, aka "HTTP 0.9" responses, are
205 detected and handled. Although HTTP 0.9 has long been obsolete, it is
206 still occasionally used, sometimes by accident.
208 ** The progress bar is now updated regularly even when the data does
209 not arrive from the network.
211 ** Wget no longer preserves permissions of files retrieved by FTP by
212 default. Anonymous FTP servers frequently use permissions like "664",
213 which might not be what the user wants. The new option
214 `--preserve-permissions' and the corresponding `.wgetrc' variable can
215 be used to revert to the old behavior.
217 ** The new option `--protocol-directories' instructs Wget to also use
218 the protocol name as a directory component of local file names.
220 ** Options that previously unconditionally set or unset various flags
221 are now boolean options that can be invoked as either `--OPTION' or
222 `--no-OPTION'. Options that required an argument "on" or "off" have
223 also been changed this way, but they still accept the old syntax for
224 backward compatibility. For example, instead of `--glob=off' you can
227 Allowing `--no-OPTION' for every `--OPTION' and the other way around
228 is useful because it allows the user to override non-default behavior
229 specified via `.wgetrc'.
231 ** The new option `--keep-session-cookies' causes `--save-cookies' to
232 save session cookies (normally only kept in memory) along with the
233 permanent ones. This is useful because many sites track important
234 information, such as whether the user has authenticated, in session
235 cookies. With this option multiple Wget runs are treated as a single
238 ** Wget now supports the --ftp-user and --ftp-password command
239 switches to set username and password for FTP, and the --user and
240 --password command switches to set username and password for both FTP
241 and HTTP. The --http-passwd and --proxy-passwd command switches have
242 been renamed to --http-password and --proxy-password respectively, and
243 the related http_passwd and proxy_passwd .wgetrc commands to
244 http_password and proxy_password respectively. The login and passwd
245 .wgetrc commands have been deprecated.
247 * `wget -b' now works correctly under Windows.
249 * Wget 1.9.1 is a bugfix release with no user-visible changes.
251 * Changes in Wget 1.9.
253 ** It is now possible to specify that POST method be used for HTTP
254 requests. For example, `wget --post-data="id=foo&data=bar" URL' will
255 send a POST request with the specified contents.
257 ** IPv6 support is available, although it's still experimental.
259 ** The `--timeout' option now also affects DNS lookup and establishing
260 the TCP connection. Previously it only affected reading and writing
261 data. Those three timeouts can be set separately using
262 `--dns-timeout', `--connection-timeout', and `--read-timeout',
265 ** Download speed shown by the progress bar is based on the data
266 recently read, rather than the average speed of the entire download.
267 The ETA projection is still based on the overall average.
269 ** It is now possible to connect to FTP servers through FWTK
270 firewalls. Set ftp_proxy to an FTP URL, and Wget will automatically
271 log on to the proxy as "username@host".
273 ** The new option `--retry-connrefused' makes Wget retry downloads
274 even in the face of refused connections, which are otherwise
275 considered a fatal error.
277 ** The new option `--no-dns-cache' may be used to prevent Wget from
280 ** Wget no longer escapes characters in local file names based on
281 whether they're appropriate in URLs. Escaping can still occur for
282 nonprintable characters or for '/', but no longer for frequent
283 characters such as space. You can use the new option
284 --restrict-file-names to relax or strengthen these rules, which can be
285 useful if you dislike the default or if you're downloading to
286 non-native partitions.
288 ** Handling of HTML comments has been dumbed down to conform to what
289 users expect and other browsers do: instead of being treated as SGML
290 declaration, a comment is terminated at the first occurrence of "-->".
291 Use `--strict-comments' to revert to the old behavior.
293 ** Wget now correctly handles relative URIs that begin with "//", such
294 as "//img.foo.com/foo.jpg".
296 ** Boolean options in `.wgetrc' and on the command line now accept
297 values "yes" and "no" along with the traditional "on" and "off".
299 ** It is now possible to specify decimal values for timeouts, waiting
300 periods, and download rate. For instance, `--wait=0.5' now works as
301 expected, as does `--dns-timeout=0.5' and even `--limit-rate=2.5k'.
303 * Wget 1.8.2 is a bugfix release with no user-visible changes.
305 * Wget 1.8.1 is a bugfix release with no user-visible changes.
307 * Changes in Wget 1.8.
309 ** A new progress indicator is now available and used by default.
310 You can choose the progress bar type with `--progress=TYPE'. Two
311 types are available, "bar" (the new default), and "dot" (the old
312 dotted indicator). You can permanently revert to the old progress
313 indicator by putting `progress = dot' in your `.wgetrc'.
315 ** You can limit the download rate of the retrieval using the
316 `--limit-rate' option. For example, `wget --limit-rate=15k URL' will
317 tell Wget not to download the body of the URL faster than 15 kilobytes
320 ** Recursive retrieval and link conversion have been revamped:
322 *** Wget now traverses links breadth-first. This makes the
323 calculation of depth much more reliable than before. Also, recursive
324 downloads are faster and consume *significantly* less memory than
327 *** Links are converted only when the entire retrieval is complete.
328 This is the only safe thing to do, as only then is it known what URLs
329 have been downloaded.
331 *** BASE tags are handled correctly when converting links. Since Wget
332 already resolves <base href="..."> when resolving handling URLs, link
333 conversion now makes the BASE tags point to an empty string.
335 *** HTML anchors are now handled correctly. Links to an anchor in the
336 same document (<a href="#anchorname">), which used to confuse Wget,
337 are now converted correctly.
339 *** When in page-requisites (-p) mode, no-parent (-np) is ignored when
340 retrieving for inline images, stylesheets, and other documents needed
343 *** Page-requisites (-p) mode now works with frames. In other words,
344 `wget -p URL-THAT-USES-FRAMES' will now download the frame HTML files,
345 and all the files that they need to be displayed properly.
347 ** `--base' now works conjunction with `--input-file', providing a
348 base for each URL and thereby allowing the URLs in the file to be
351 ** If a host has more than one IP address, Wget uses the other
352 addresses when accessing the first one fails.
354 ** Host directories now contain port information if the URL is at a
357 ** Wget now supports the robots.txt directives specified in
358 <http://www.robotstxt.org/wc/norobots-rfc.txt>.
360 ** URL parser has been fixed, especially the infamous overzealous
361 quoting. Wget no longer dequotes reserved characters, e.g. `%3F' is
362 no longer translated to `?', nor `%2B' to `+'. Unsafe characters
363 which are not reserved are still escaped, of course.
365 ** No more than 20 successive redirections are allowed.
367 * Wget 1.7.1 is a bugfix release with no user-visible changes.
369 * Changes in Wget 1.7.
371 ** SSL (`https') pages now work if you compile Wget with SSL support;
372 use the `--with-ssl' configure flag. You need to have OpenSSL
375 ** Cookies are now supported. Wget will accept cookies sent by the
376 server and return them in later requests. Additionally, it can load
377 and save cookies to disk, in the same format that Netscape uses.
379 ** "Keep-alive" (persistent) HTTP connections are now supported.
380 Using keep-alive allows Wget to share one TCP/IP connection for
381 many retrievals, making multiple-file downloads faster and less
382 stressing for the server and the network.
384 ** Wget now recognizes FTP directory listings generated by NT and VMS
387 ** It is now possible to recurse through FTP sites where logging in
388 puts you in some directory other than '/'.
390 ** You may now use `~' to mean home directory in `.wgetrc'. For
391 example, `load_cookies = ~/.netscape/cookies.txt' works as you would
394 ** The HTML parser has been rewritten. The new one works more
395 reliably, allows finer-grained control over which tags and attributes
396 are detected, and has better support for some features like correctly
397 skipping comments and declarations, decoding entities, etc. It is
400 ** <meta name="robots"> tags are now respected.
402 ** Wget's internal tables now use hash tables instead of linked lists
403 where appropriate. This results in huge speedups when retrieving
404 large sites (thousands of documents).
406 ** Wget now has a man page, automatically generated from the Texinfo
407 documentation. (The last version that shipped with a man page was
408 1.4.5). To get this, you need to have pod2man from the Perl
409 distribution installed on your system.
411 * Changes in Wget 1.6
413 ** Administrative changes.
415 *** Maintainership. Due to Hrvoje being plagued with a "real job",
416 Dan Harkless is the most active maintainer (not that he doesn't have a
417 real job as well). Hrvoje still participates occasionally, and both
418 are being helped by many other people.
420 *** Web page. Thanks to Jan Prikryl, Wget has an "official" web page.
423 http://sunsite.dk/wget/
425 *** Anonymous CVS. Thanks to ever-helpful Karsten Thygesen, Wget
426 sources are now available at an anonymous CVS server. Take a look at
427 the web page for downloading instructions.
429 ** New -K / --backup-converted / backup_converted = on option causes files
430 modified due to -k to be saved with a .orig prefix before being changed. When
431 using -N as well, it is these .orig files that are compared against the server.
433 ** New --follow-tags / follow_tags = ... option allows you to restrict
434 Wget to following only certain HTML tags when doing a recursive
435 retrieval. -G / --ignore-tags / ignore_tags = ... is just the
436 opposite -- all tags but the ones you specify will be followed.
438 ** New --waitretry / waitretry = SECONDS option allows waiting between retries
439 of failed downloads. Wget will use "linear" backoff, waiting 1 second after the
440 first failure, 2 after the second, up to SECONDS. waitretry is set to 10 by
441 default in the system wgetrc.
443 ** New -p / --page-requisites / page_requisites = on option causes
444 Wget to download all ancillary files necessary to display a given HTML
445 page properly (e.g. inlined images).
447 ** New -E / --html-extension / html_extension = on option causes Wget
448 to append ".html" to text/html filenames not ending in regexp
449 "\.[Hh][Tt][Mm][Ll]?".
451 ** New type of .wgetrc command -- "lockable Boolean". Can be set to on, off,
452 always, or never. This allows the .wgetrc to override the commandline. So far,
453 passive_ftp is the only .wgetrc command which takes a lockable Boolean.
455 ** A number of new translation files have been added.
457 ** New --bind-address / bind_address = <address> option for people on hosts
458 bound to multiple IP addresses.
460 ** wget now accepts (illegal per HTTP spec) relative URLs in HTTP redirects.
462 * Wget 1.5.3 is a bugfix release with no user-visible changes.
464 * Wget 1.5.2 is a bugfix release with no user-visible changes.
466 * Wget 1.5.1 is a bugfix release with no user-visible changes.
468 * Changes in Wget 1.5.0
470 ** Wget speaks many languages!
472 On systems with gettext(), Wget will output messages in the language
473 set by the current locale, if available. At this time we support
474 Czech, German, Croatian, Italian, Norwegian and Portuguese.
476 ** Opie (Skey) is now supported with FTP.
478 ** HTTP Digest Access Authentication (RFC2069) is now supported.
480 ** The new `-b' option makes Wget go to background automatically.
482 ** The `-I' and `-X' options now accept wildcard arguments.
484 ** The `-w' option now accepts suffixes `s' for seconds, `m' for
485 minutes, `h' for hours, `d' for days and `w' for weeks.
487 ** Upon getting SIGHUP, the whole previous log is now copied to
490 ** Wget now understands proxy settings with explicit usernames and
491 passwords, e.g. `http://user:password@proxy.foo.com/'.
493 ** You can use the new `--cut-dirs' option to make Wget create less
496 ** The `;type=a' appendix to FTP URLs is now recognized. For
497 instance, the following command will retrieve the welcoming message in
500 wget "ftp://ftp.somewhere.com/welcome.msg;type=a"
502 ** `--help' and `--version' options have been redone to to conform to
503 standards set by other GNU utilities.
505 ** Wget should now be compilable under MS Windows environment. MS
506 Visual C++ and Watcom C have been used successfully.
508 ** If the file length is known, percentages are displayed during
511 ** The manual page, now hopelessly out of date, is no longer
512 distributed with Wget.
514 * Wget 1.4.5 is a bugfix release with no user-visible changes.
516 * Wget 1.4.4 is a bugfix release with no user-visible changes.
518 * Changes in Wget 1.4.3
520 ** Wget is now a GNU utility.
522 ** Can do passive FTP.
526 ** Info documentation expanded.
528 ** Compiles on pre-ANSI compilers.
530 ** Global wgetrc now goes to /usr/local/etc (i.e. $sysconfdir).
534 * Changes in Wget 1.4.2
536 ** New mirror site at ftp://sunsite.auc.dk/pub/infosystems/wget/,
537 thanks to Karsten Thygesen.
539 ** Mailing list! Mail to wget-request@sunsite.auc.dk to subscribe.
541 ** New option --delete-after for proxy prefetching.
543 ** New option --retr-symlinks to retrieve symbolic links like plain
546 ** rmold.pl -- script to remove files deleted on the remote server
548 ** --convert-links should work now.
552 * Changes in Wget 1.4.1
556 ** Added -I (the opposite of -X).
558 ** Dot tracing is now customizable; try wget --dot-style=binary
560 * Changes in Wget 1.4.0
562 ** Wget 1.4.0 [formerly known as Geturl] is an extensive rewrite of
563 Geturl. Although many things look suspiciously similar, most of the
564 stuff was rewritten, like recursive retrieval, HTTP, FTP and mostly
565 everything else. Wget should be now easier to debug, maintain and,
566 most importantly, use.
568 ** Recursive HTTP should now work without glitches, even with Location
569 changes, server-generated directory listings and other naughty stuff.
571 ** HTTP regetting is supported on servers that support Range
572 specification. WWW authorization is supported -- try
573 wget http://user:password@hostname/
575 ** FTP support was rewritten and widely enhanced. Globbing should now
576 work flawlessly. Symbolic links are created locally. All the
577 information the Unix-style ls listing can give is now recognized.
579 ** Recursive FTP is supported, e.g.
580 wget -r ftp://gnjilux.cc.fer.hr/pub/unix/util/
582 ** You can specify "rejected" directories, to which you do not want to
583 enter, e.g. with wget -X /pub
585 ** Time-stamping is supported, with both HTTP and FTP. Try wget -N URL.
587 ** A new texinfo reference manual is provided. It can be read with
588 Emacs, standalone info, or converted to HTML, dvi or postscript.
590 ** Fixed a long-standing bug, so that Wget now works over SLIP
593 ** You can have a system-wide wgetrc (/usr/local/lib/wgetrc by
594 default). Settings in $HOME/.wgetrc override the global ones, of
597 ** You can set up quota in .wgetrc to prevent sucking too much
598 data. Try `quota = 5M' in .wgetrc (or quota = 100K if you want your
599 sysadmin to like you).
601 ** Download rate is printed after retrieval.
603 ** Wget now sends the `Referer' header when retrieving
606 ** With the new --no-parent option Wget can retrieve FTP recursively
607 through a proxy server.
609 ** HTML parser, as well as the whole of Wget was rewritten to be much
610 faster and less memory-consuming (yes, both).
612 ** Absolute links can be converted to relative links locally. Check
615 ** Wget catches hangup, filtering the output to a log file and
616 resuming work. Try kill -HUP %?wget.
618 ** User-defined headers can be sent. Try
620 wget http://fly.cc.her.hr/ --header='Accept-Charset: iso-8859-2'
622 ** Acceptance/Rejection lists may contain wildcards.
624 ** Wget can display HTTP headers and/or FTP server response with the
625 new `-S' option. It can save the original HTTP headers with `-s'.
627 ** socks library is now supported (thanks to Antonio Rosella
628 <Antonio.Rosella@agip.it>). Configure with --with-socks.
630 ** There is a nicer display of REST-ed output.
632 ** Many new options (like -x to force directory hierarchy, or -m to
633 turn on mirroring options).
635 ** Wget is now distributed under GNU General Public License (GPL).
637 ** Lots of small features I can't remember. :-)
639 ** A host of bugfixes.
641 * Changes in Geturl 1.3
643 ** Added FTP globbing support (ftp://fly.cc.fer.hr/*)
645 ** Added support for no_proxy
647 ** Added support for ftp://user:password@host/
649 ** Added support for %xx in URL syntax
651 ** More natural command-line options
653 ** Added -e switch to execute .geturlrc commands from the command-line
655 ** Added support for robots.txt
657 ** Fixed some minor bugs
659 * Geturl 1.2 is a bugfix release with no user-visible changes.
661 * Changes in Geturl 1.1
663 ** REST supported in FTP
665 ** Proxy servers supported
667 ** GNU getopt used, which enables command-line arguments to be ordered
668 as you wish, e.g. geturl http://fly.cc.fer.hr/ -vo log is the same as
669 geturl -vo log http://fly.cc.fer.hr/
671 ** Netscape-compatible URL syntax for HTTP supported: host[:port]/dir/file
673 ** NcFTP-compatible colon URL syntax for FTP supported: host:/dir/file
675 ** <base href="xxx"> supported
677 ** autoconf supported
679 ----------------------------------------------------------------------
680 Copyright information:
682 Copyright (C) 1997-2005 Free Software Foundation, Inc.
684 Permission is granted to anyone to make or distribute verbatim
685 copies of this document as received, in any medium, provided that
686 the copyright notice and this permission notice are preserved, thus
687 giving the recipient permission to redistribute in turn.
689 Permission is granted to distribute modified versions of this
690 document, or of portions of it, under the above conditions,
691 provided also that they carry prominent notices stating who last