Merge branch 'master' of ssh://git.privoxy.org:23/git/privoxy
[privoxy.git] / doc / webserver / user-manual / whatsnew.html
index 2d5f1f6..63d9c00 100644 (file)
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01
-Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+"http://www.w3.org/TR/html4/loose.dtd">
 <html>
-  <head>
-    <title>
-      What's New in this Release
-    </title>
-    <meta name="GENERATOR" content=
-    "Modular DocBook HTML Stylesheet Version 1.79">
-    <link rel="HOME" title="Privoxy 3.0.26 User Manual" href="index.html">
-    <link rel="PREVIOUS" title="Installation" href="installation.html">
-    <link rel="NEXT" title="Quickstart to Using Privoxy" href=
-    "quickstart.html">
-    <link rel="STYLESHEET" type="text/css" href="../p_doc.css">
-    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
-    <link rel="STYLESHEET" type="text/css" href="p_doc.css">
-  </head>
-  <body class="SECT1" bgcolor="#EEEEEE" text="#000000" link="#0000FF" vlink=
-  "#840084" alink="#0000FF">
-    <div class="NAVHEADER">
-      <table summary="Header navigation table" width="100%" border="0"
-      cellpadding="0" cellspacing="0">
-        <tr>
-          <th colspan="3" align="center">
-            Privoxy 3.0.26 User Manual
-          </th>
-        </tr>
-        <tr>
-          <td width="10%" align="left" valign="bottom">
-            <a href="installation.html" accesskey="P">Prev</a>
-          </td>
-          <td width="80%" align="center" valign="bottom">
-          </td>
-          <td width="10%" align="right" valign="bottom">
-            <a href="quickstart.html" accesskey="N">Next</a>
-          </td>
-        </tr>
-      </table>
-      <hr align="LEFT" width="100%">
-    </div>
-    <div class="SECT1">
-      <h1 class="SECT1">
-        <a name="WHATSNEW">3. What's New in this Release</a>
-      </h1>
-      <p>
-        <span class="APPLICATION">Privoxy 3.0.26</span> stable is a bug-fix
-        release for the previously released 3.0.25 beta which introduced
-        client-specific tags and included a couple of minor improvements.
-      </p>
-      <p>
-      </p>
-      <ul>
-        <li>
-          <p>
-            Bug fixes:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Fixed crashes with "listen-addr :8118" (SF Bug #902). The
-                regression was introduced in 3.0.25 beta and reported by
-                Marvin Renich in Debian bug #834941.
-              </p>
-            </li>
-          </ul>
-        </li>
-        <li>
-          <p>
-            General improvements:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Log when privoxy is toggled on or off via cgi interface.
-              </p>
-            </li>
-            <li>
-              <p>
-                Highlight the "Info: Now toggled " on/off log message in the
-                Windows log viewer.
-              </p>
-            </li>
-            <li>
-              <p>
-                Highlight the loading actions/filter file log message in the
-                Windows log viewer.
-              </p>
-            </li>
-            <li>
-              <p>
-                Mention client-specific tags on the toggle page as a
-                potentionally more appropriate alternative.
-              </p>
-            </li>
-          </ul>
-        </li>
-        <li>
-          <p>
-            Documentation improvements:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Update download section on the homepage. The downloads are
-                available from the website now.
-              </p>
-            </li>
-            <li>
-              <p>
-                Add sponsor FAQ.
-              </p>
-            </li>
-            <li>
-              <p>
-                Remove obsolete reference to mailing lists hosted at
-                SourceForge.
-              </p>
-            </li>
-            <li>
-              <p>
-                Update the "Before the Release" section of the developer
-                manual.
-              </p>
-            </li>
-          </ul>
-        </li>
-        <li>
-          <p>
-            Infrastructure improvements:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Add perl script to generate an RSS feed for the packages
-                Submitted by "Unknown".
-              </p>
-            </li>
-          </ul>
-        </li>
-        <li>
-          <p>
-            Build system improvements:
-          </p>
-          <ul>
-            <li>
-              <p>
-                strptime.h: fix a compiler warning about ambiguous else.
-              </p>
-            </li>
-            <li>
-              <p>
-                configure.in: Check for Docbook goo on the BSDs as well.
-              </p>
-            </li>
-            <li>
-              <p>
-                GNUMakefile.in: Let the dok-user target remove temporary
-                files.
-              </p>
-            </li>
-          </ul>
-        </li>
-      </ul>
-
-      <p>
-        <span class="APPLICATION">Privoxy 3.0.25</span> beta introduces
-        client-specific tags and includes a couple of minor improvements. It
-        will be followed by a stable release in the near future.
-      </p>
-      <p>
-      </p>
+<head>
+  <title>What's New in this Release</title>
+  <meta name="GENERATOR" content="Modular DocBook HTML Stylesheet Version 1.79">
+  <link rel="HOME" title="Privoxy 3.0.30 User Manual" href="index.html">
+  <link rel="PREVIOUS" title="Installation" href="installation.html">
+  <link rel="NEXT" title="Quickstart to Using Privoxy" href="quickstart.html">
+  <link rel="STYLESHEET" type="text/css" href="../p_doc.css">
+  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+  <link rel="STYLESHEET" type="text/css" href="p_doc.css">
+</head>
+<body class="SECT1" bgcolor="#EEEEEE" text="#000000" link="#0000FF" vlink="#840084" alink="#0000FF">
+  <div class="NAVHEADER">
+    <table summary="Header navigation table" width="100%" border="0" cellpadding="0" cellspacing="0">
+      <tr>
+        <th colspan="3" align="center">Privoxy 3.0.30 User Manual</th>
+      </tr>
+      <tr>
+        <td width="10%" align="left" valign="bottom"><a href="installation.html" accesskey="P">Prev</a></td>
+        <td width="80%" align="center" valign="bottom"></td>
+        <td width="10%" align="right" valign="bottom"><a href="quickstart.html" accesskey="N">Next</a></td>
+      </tr>
+    </table>
+    <hr align="left" width="100%">
+  </div>
+  <div class="SECT1">
+    <h1 class="SECT1"><a name="WHATSNEW" id="WHATSNEW">3. What's New in this Release</a></h1>
+    <p><span class="APPLICATION">Privoxy 3.0.29</span> fixes a couple of memory leaks and introduces https inspection
+    which allows to filter encrypted requests and responses.</p>
+    <p>Changes in <span class="APPLICATION">Privoxy 3.0.29</span> stable:</p>
+    <ul>
+      <li>
+        <p>Security/Reliability:</p>
+        <ul>
+          <li>
+            <p>Fixed memory leaks when a response is buffered and the buffer limit is reached or Privoxy is running out
+            of memory. Commits bbd53f1010b and 4490d451f9b. OVE-20201118-0001. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Fixed a memory leak in the show-status CGI handler when no action files are configured. Commit
+            c62254a686. OVE-20201118-0002. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Fixed a memory leak in the show-status CGI handler when no filter files are configured. Commit
+            1b1370f7a8a. OVE-20201118-0003. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Fixes a memory leak when client tags are active. Commit 245e1cf32. OVE-20201118-0004. Sponsored by:
+            Robert Klemme</p>
+          </li>
+          <li>
+            <p>Fixed a memory leak if multiple filters are executed and the last one is skipped due to a pcre error.
+            Commit 5cfb7bc8fe. OVE-20201118-0005.</p>
+          </li>
+          <li>
+            <p>Prevent an unlikely dereference of a NULL-pointer that could result in a crash if
+            accept-intercepted-requests was enabled, Privoxy failed to get the request destination from the Host header
+            and a memory allocation failed. Commit 7530132349. CID 267165. OVE-20201118-0006.</p>
+          </li>
+          <li>
+            <p>Fixed memory leaks in the client-tags CGI handler when client tags are configured and memory allocations
+            fail. Commit cf5640eb2a. CID 267168. OVE-20201118-0007.</p>
+          </li>
+          <li>
+            <p>Fixed memory leaks in the show-status CGI handler when memory allocations fail. Commit 064eac5fd0 and
+            commit fdee85c0bf3. CID 305233. OVE-20201118-0008.</p>
+          </li>
+        </ul>
+      </li>
+      <li>
+        <p>General improvements:</p>
+        <ul>
+          <li>
+            <p>Added experimental https inspection support which allows to filter https traffic. To enable it, install
+            MbedTLS and configure with --with-mbedtls, or install OpenSSL or LibreSSL and configure with
+            --with-openssl. Afterwards configure the directives in section 7 of the config file and enable the
+            +https-inspection action. Initial MbedTLS-based code contributed by Vaclav Svec, initial OpenSSL support
+            contributed by Maxim Antonov. With help from Nedzad Hrnjica and Ho+ Ho+ Ho+. Integration and improvements
+            sponsored by Robert Klemme.</p>
+          </li>
+          <li>
+            <p>pcrs: Request JIT compilation if it's supported and the filter isn't dynamic. This can speed up
+            filtering.</p>
+          </li>
+          <li>
+            <p>Added support for Brotli decompression. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Added FEATURE_EXTENDED_STATISTICS to gather statistics for block reasons and filter executions. To
+            enable it, configure with --enable-extended-statistics and visit http://config.privoxy.org/show-status.
+            Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Use the IP_FREEBIND socket option, if defined. This allows Privoxy to bind to not-yet assigned IP
+            addresses which is useful in failover environments. Patch by Sam Varshavchik.</p>
+          </li>
+          <li>
+            <p>Allow to use extended host patterns and vanilla host patterns at the same time by prefixing extended
+            host patterns with "PCRE-HOST-PATTERN:". To enable this, configure with --enable-pcre-host-patterns.
+            Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Added "Cross-origin resource sharing" (CORS) support. This allows to access Privoxy's CGI interface via
+            JavaScript from another domain (white-listed with the new cors-allowed-origin directive). Based on a patch
+            by Nedzad Hrnjica. Sponsored by: Robert Klemme.</p>
+          </li>
+          <li>
+            <p>Add SOCKS5 username/password support. Based on a patch by Sam, improved by Ivan Romanov. Closes
+            Patch#141 and solves TODO#105.</p>
+          </li>
+          <li>
+            <p>Bump the maximum number of action and filter files to 100 each. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Fixed handling of filters with "split-large-forms 1" when using the CGI editor. Reported by withoutname
+            in #921.</p>
+          </li>
+          <li>
+            <p>Better detect a mismatch of connection details when figuring out whether or not a connection can be
+            reused.</p>
+          </li>
+          <li>
+            <p>Don't send a "Connection failure" message instead of the "DNS failure" message. Sponsored by: Robert
+            Klemme</p>
+          </li>
+          <li>
+            <p>Let LOG_LEVEL_REQUEST log all requests. Previously unencrypted requests were only logged with
+            LOG_LEVEL_REQUEST when they weren't crunched (in which case they were logged with LOG_LEVEL_CRUNCH). This
+            was documented behaviour, but logging all requests seems more useful.</p>
+          </li>
+          <li>
+            <p>Fixed locking around localtime() and gmtime().</p>
+          </li>
+          <li>
+            <p>Removed OS/2 support. We haven't provided OS/2 packages in years, it complicated the code and it
+            depended on a fallback snprintf() implementation which is GPLv2 only.</p>
+          </li>
+          <li>
+            <p>Remove the fallback snprintf() implementation Now that OS/2 support is gone we no longer need it.</p>
+          </li>
+          <li>
+            <p>Fixed a bunch of format specifiers log messages.</p>
+          </li>
+          <li>
+            <p>Added a missing apostrophe in the 'More Privoxy' menu.</p>
+          </li>
+          <li>
+            <p>Explicitly prevent use of FEATURE_CONNECTION_SHARING without FEATURE_CONNECTION_KEEP_ALIVE. It makes no
+            sense and does not compile anyway. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Fix build without FEATURE_CONNECTION_KEEP_ALIVE. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Downgrade the 'Graceful termination requested' message to LOG_LEVEL_INFO as it isn't an error. Sponsored
+            by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>decompress_iob(): Downgrade the no-content message to LOG_LEVEL_RE_FILTER While at it, fix a typo in a
+            comment. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Fixed a couple of cppcheck warnings.</p>
+          </li>
+          <li>
+            <p>Rename LOG_LEVEL_GPC to LOG_LEVEL_REQUEST. Only the shadow knows what "GPC" is supposed to stand
+            for.</p>
+          </li>
+          <li>
+            <p>Remove SourceForge references in copyright headers.</p>
+          </li>
+          <li>
+            <p>Upgrade a bunch of links to the homepage to https://.</p>
+          </li>
+          <li>
+            <p>Add 'no-brotli-accepted' filter which prevents the use of Brotli compression.</p>
+          </li>
+          <li>
+            <p>Changed license for pcrs to GPLv2+ after getting the permission from Andreas. This allows to
+            redistribute Privoxy under the GPLv3 which is required when linking to future mbedTLS versions which are
+            expected to be licensed under the Apache 2.0 license only.</p>
+          </li>
+          <li>
+            <p>Updated a bunch of tests that have to expect status code 403 now after r1.168/070e904afa5.</p>
+          </li>
+          <li>
+            <p>Lowercase the host name in the request line.</p>
+          </li>
+          <li>
+            <p>Only set SOURCE_DATE_EPOCH if it's not already set so distributions can overwrite it through the
+            environment.</p>
+          </li>
+        </ul>
+      </li>
+      <li>
+        <p>Documentation changes:</p>
+        <ul>
+          <li>
+            <p>Explain that Privoxy has to be distributed under the GPLv3 (or later) when linked with an MbedTLS
+            version that is licensed under the Apache 2.0 license.</p>
+          </li>
+          <li>
+            <p>Import the GNU GPLv3 and include it the user manual.</p>
+          </li>
+          <li>
+            <p>Clarify FEATURE_FORCE_LOAD's description. It allows to bypass blocking not filtering and only does it if
+            blocks aren't enforced. Reported by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>FAQ: Remove Zwiebelfreunde e.V. from the list of fiduciary sponsors As of 2021 they no longer handle
+            donations for foreign organisations due to lack of resources.</p>
+          </li>
+          <li>
+            <p>FAQ: Remove an obsolete comment with a link to the long-gone PDF manual.</p>
+          </li>
+          <li>
+            <p>FAQ: Add a link to the TODO list.</p>
+          </li>
+          <li>
+            <p>FAQ: Change the sponsor amounts to USD slightly rounding the converted amounts up to get simple numbers.
+            Receiving USD is apparently easier for SPI and SPI is preferred by sponsors as they can send invoices.</p>
+          </li>
+          <li>
+            <p>Advertise the client-tags CGI page in the user manual.</p>
+          </li>
+          <li>
+            <p>Stop advertising the show-version CGI page which no longer exists.</p>
+          </li>
+          <li>
+            <p>Add yet another reason why +prevent-compression may cause problems.</p>
+          </li>
+          <li>
+            <p>Don't claim that contributors need ssh. It's only needed for committers.</p>
+          </li>
+          <li>
+            <p>Replace obsolete CVS instructions with Git instructions.</p>
+          </li>
+          <li>
+            <p>Remove an obsolete comment</p>
+          </li>
+        </ul>
+      </li>
+      <li>
+        <p>Config file changes:</p>
+        <ul>
+          <li>
+            <p>Change the suggested default-server-timeout to 5 to match the suggested keep-alive-timeout. Otherwise
+            using the defaults would result in Privoxy reducing the default-server-timeout and logging an error
+            message. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Update the 'debug 1' description.</p>
+          </li>
+          <li>
+            <p>Add a missing 'client-specific-tag' directive.</p>
+          </li>
+          <li>
+            <p>Comment out trusted-cgi-referer pointing to example.org.</p>
+          </li>
+        </ul>
+      </li>
+      <li>
+        <p>Action file improvements:</p>
+        <ul>
+          <li>
+            <p>Block requests to /(.*/)?piwik\.php</p>
+          </li>
+          <li>
+            <p>Block requests to .connectaserver.de/</p>
+          </li>
+          <li>
+            <p>Block requests to pixel.inforsea.com/</p>
+          </li>
+          <li>
+            <p>Block requests to t.vi-serve.com/</p>
+          </li>
+          <li>
+            <p>Block requests to .ioam.de/</p>
+          </li>
+          <li>
+            <p>Block requests to t.9gag.com/img.gif</p>
+          </li>
+          <li>
+            <p>Block requests to .pixel.parsely.com/ as image</p>
+          </li>
+          <li>
+            <p>Block requests to pixel.wp.com/</p>
+          </li>
+          <li>
+            <p>Disable fast-redirects for .librarything.com/</p>
+          </li>
+          <li>
+            <p>Disable fast-redirects for issue.freebsdfoundation.org/</p>
+          </li>
+          <li>
+            <p>Disable fast-redirects for .twitter.com/.*origin=http</p>
+          </li>
+          <li>
+            <p>Unblock belco24.de/</p>
+          </li>
+          <li>
+            <p>Add fast-redirects exception for .wikipedia.org/</p>
+          </li>
+          <li>
+            <p>Add fast-redirects exception for oss-fuzz.com/</p>
+          </li>
+          <li>
+            <p>Disable fast-redirects for .consensu.org/delivery/pixel\.php and block the requests as image instead</p>
+          </li>
+          <li>
+            <p>Unblock .adbinstaller.com/ Reported by lvm in #942.</p>
+          </li>
+          <li>
+            <p>Unblock .adbshell.com Reported by lvm in #942.</p>
+          </li>
+          <li>
+            <p>Unblock .tagesschau.de/</p>
+          </li>
+          <li>
+            <p>Disable fast-redirects for collector.githubapp.com/ and block requests to it as image instead</p>
+          </li>
+          <li>
+            <p>Unblock 'ada*.'</p>
+          </li>
+          <li>
+            <p>Add fast-redirects{} exception for sourcepoint.vice.com/</p>
+          </li>
+          <li>
+            <p>Unblock adaway.org/ Reported by DRS David Soft in AF#945.</p>
+          </li>
+          <li>
+            <p>Change two block reasons that previously were the same. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Added a +delay-response{} test.</p>
+          </li>
+          <li>
+            <p>Updated the location of the development version of default.action.master.</p>
+          </li>
+        </ul>
+      </li>
+      <li>
+        <p>Privoxy-Log-Parser:</p>
+        <ul>
+          <li>
+            <p>Added a --keep-date option to keep the date in highlighted messages.</p>
+          </li>
+          <li>
+            <p>Highlight new log messages.</p>
+          </li>
+          <li>
+            <p>Make gather_loglevel_clf_stats() more tolerant. While at it, count all CLF messages as requests, even if
+            the request is invalid.</p>
+          </li>
+          <li>
+            <p>Only show HTTP version distribution if at least one version has been detected.</p>
+          </li>
+          <li>
+            <p>Only show crunch statistics if crunches were detected.</p>
+          </li>
+          <li>
+            <p>Warn if the request counts differ.</p>
+          </li>
+          <li>
+            <p>Generate statistics if the log only contains LOG_LEVEL_CLF messages so it can be used with vanilla
+            webserver logs. Previously Privoxy-specific "Request:" messages were required.</p>
+          </li>
+          <li>
+            <p>Align the client-HTTP-version distribution like other distributions</p>
+          </li>
+          <li>
+            <p>Bump version to 0.9.1</p>
+          </li>
+          <li>
+            <p>Include status code distribution in the stats.</p>
+          </li>
+          <li>
+            <p>Let the statistics include the size of the content Privoxy transferred excluding HTTP headers.</p>
+          </li>
+          <li>
+            <p>Get with the program and expect all requests to be logged with LOG_LEVEL_REQUEST. It's no longer
+            necessary to count both LOG_LEVEL_REQUEST and LOG_LEVEL_CRUNCH messages to get the total number of
+            requests.</p>
+          </li>
+          <li>
+            <p>Leverage the LOG_LEVEL_CLF message to gather statistics that where previously taken from
+            LOG_LEVEL_HEADER lines. This results in less confusing results if https inspection is enabled in which case
+            there are two LOG_LEVEL_HEADER lines with request lines. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Properly highlight the filter results message. Previously a brace got lost.</p>
+          </li>
+          <li>
+            <p>Prefer the number of CLF lines to get the total number of requests as it works with older Privoxy
+            versions as well.</p>
+          </li>
+        </ul>
+      </li>
+      <li>
+        <p>Privoxy-Regression-Test:</p>
+        <ul>
+          <li>
+            <p>Turn curl's globbing mode off so we can allow more characters in URLs.</p>
+          </li>
+          <li>
+            <p>Allow '[' and ']' in URLs.</p>
+          </li>
+          <li>
+            <p>Include the action file when complaining about missing Sticky Actions.</p>
+          </li>
+          <li>
+            <p>Fix a sentence in the documentation.</p>
+          </li>
+          <li>
+            <p>Bump version to 0.7.1</p>
+          </li>
+        </ul>
+      </li>
+      <li>
+        <p>url-pattern-translator:</p>
+        <ul>
+          <li>
+            <p>Detect a couple of pattern prefixes case-insensitively. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Skip CLIENT-TAG patterns. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Skip patterns that have already been converted. It should now be safe to "convert" a file multiple
+            times. Sponsored by: Robert Klemme</p>
+          </li>
+          <li>
+            <p>Add the new 'PCRE-HOST-PATTERN:' prefix. Sponsored by: Robert Klemme</p>
+          </li>
+        </ul>
+      </li>
+    </ul>
+    <div class="SECT2">
+      <h2 class="SECT2"><a name="UPGRADERSNOTE" id="UPGRADERSNOTE">3.1. Note to Upgraders</a></h2>
+      <p>A quick list of things to be aware of before upgrading from earlier versions of <span class=
+      "APPLICATION">Privoxy</span>:</p>
       <ul>
         <li>
-          <p>
-            Bug fixes:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Always use the current toggle state for new requests.
-                Previously new requests on reused connections inherited the
-                toggle state from the previous request even though the toggle
-                state could have changed. Reported by Robert Klemme.
-              </p>
-            </li>
-            <li>
-              <p>
-                Fixed two buffer-overflows in the (deprecated) static pcre
-                code. These bugs are not considered security issues as the
-                input is trusted. Found with afl-fuzz and ASAN.
-              </p>
-            </li>
-          </ul>
-        </li>
-        <li>
-          <p>
-            General improvements:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Added support for client-specific tags which allow Privoxy
-                admins to pre-define tags that are set for all requests from
-                clients that previously opted in through the CGI interface.
-                They are useful in multi-user setups where admins may want to
-                allow users to disable certain actions and filters for
-                themselves without affecting others. In single-user setups
-                they are useful to allow more fine-grained toggling. For
-                example to disable request blocking while still crunching
-                cookies, or to disable experimental filters only. This is an
-                experimental feature, the syntax and behaviour may change in
-                future versions. Sponsored by Robert Klemme.
-              </p>
-            </li>
-            <li>
-              <p>
-                Dynamic filters and taggers now support a $listen-address
-                variable which contains the address the request came in on.
-                For external filters the variable is called
-                $PRIVOXY_LISTEN_ADDRESS. Original patch contributed by
-                pursievro.
-              </p>
-            </li>
-            <li>
-              <p>
-                Add client-header-tagger 'listen-address'.
-              </p>
-            </li>
-            <li>
-              <p>
-                Include the listen-address in the log message when logging
-                new requests. Patch contributed by pursievro.
-              </p>
-            </li>
-            <li>
-              <p>
-                Turn invalid max-client-connections values into fatal errors.
-              </p>
-            </li>
-            <li>
-              <p>
-                The show-status page now shows whether or not dates before
-                1970 and after 2038 are expected to be handled properly. This
-                is mainly useful for Privoxy-Regression-Test but could also
-                come handy when dealing with time-related support requests.
-              </p>
-            </li>
-            <li>
-              <p>
-                On Mac OS X the thread id in log messages are more likely to
-                be unique now.
-              </p>
-            </li>
-            <li>
-              <p>
-                When complaining about missing filters, the filter type is
-                logged as well.
-              </p>
-            </li>
-            <li>
-              <p>
-                A couple of harmless coverity warnings were silenced (CID
-                #161202, CID #161203, CID #161211).
-              </p>
-            </li>
-          </ul>
+          <p>The recommended way to upgrade <span class="APPLICATION">Privoxy</span> is to backup your old
+          configuration files, install the new ones, verify that <span class="APPLICATION">Privoxy</span> is working
+          correctly and finally merge back your changes using <span class="APPLICATION">diff</span> and maybe
+          <span class="APPLICATION">patch</span>.</p>
+          <p>There are a number of new features in each <span class="APPLICATION">Privoxy</span> release and most of
+          them have to be explicitly enabled in the configuration files. Old configuration files obviously don't do
+          that and due to syntax changes using old configuration files with a new <span class=
+          "APPLICATION">Privoxy</span> isn't always possible anyway.</p>
         </li>
         <li>
-          <p>
-            Action file improvements:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Filtering is disabled for Range requests to let download
-                resumption and Windows updates work with the default
-                configuration.
-              </p>
-            </li>
-            <li>
-              <p>
-                Unblock ".ardmediathek.de/". Reported by ThTomate in #932.
-              </p>
-            </li>
-          </ul>
+          <p>Note that some installers remove earlier versions completely, including configuration files, therefore you
+          should really save any important configuration files!</p>
         </li>
         <li>
-          <p>
-            Documentation improvements:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Add FAQ entry for crashes caused by memory limits.
-              </p>
-            </li>
-            <li>
-              <p>
-                Remove obsolete FAQ entry about a bug in PHP 4.2.3.
-              </p>
-            </li>
-            <li>
-              <p>
-                Mention the new mailing lists were appropriate. As the
-                archives have not been migrated, continue to mention the
-                archives at SF in the contacting section for now.
-              </p>
-            </li>
-            <li>
-              <p>
-                Note that the templates should be adjusted if Privoxy is
-                running as intercepting proxy without getting all requests.
-              </p>
-            </li>
-            <li>
-              <p>
-                A bunch of links were converted to https://.
-              </p>
-            </li>
-            <li>
-              <p>
-                Rephrase onion service paragraph to make it more obvious that
-                Tor is involved and that the whole website (and not just the
-                homepage) is available as onion service.
-              </p>
-            </li>
-            <li>
-              <p>
-                Streamline the "More information" section on the homepage
-                further by additionally ditching the link to the 'See also'
-                section of the user manual. The section contains mostly links
-                that are directly reachable from the homepage already and the
-                rest is not significant enough to get a link from the
-                homepage.
-              </p>
-            </li>
-            <li>
-              <p>
-                Change the add-header{} example to set the DNT header and use
-                a complete section to make copy and pasting more convenient.
-                Add a comment to make it obvious that adding the header is
-                not recommended for obvious reasons. Using the DNT header as
-                example was suggested by Leo Wzukw.
-              </p>
-            </li>
-            <li>
-              <p>
-                Streamline the support-and-service template Instead of
-                linking to the various support trackers (whose URLs hopefully
-                change soon), link to the contact section of the user manual
-                to increase the chances that users actually read it.
-              </p>
-            </li>
-            <li>
-              <p>
-                Add a FAQ entry for tainted sockets.
-              </p>
-            </li>
-            <li>
-              <p>
-                More sections in the documentation have stable URLs now.
-              </p>
-            </li>
-            <li>
-              <p>
-                FAQ: Explain why 'ping config.privoxy.org' is not expected to
-                reach a local Privoxy installation.
-              </p>
-            </li>
-            <li>
-              <p>
-                Note that donations done through Zwiebelfreunde e.V.
-                currently can't be checked automatically.
-              </p>
-            </li>
-            <li>
-              <p>
-                Updated section regarding starting Privoxy under OS X.
-              </p>
-            </li>
-            <li>
-              <p>
-                Use dedicated start instructions for FreeBSD and ElectroBSD.
-              </p>
-            </li>
-            <li>
-              <p>
-                Removed release instructions for AIX. They haven't been
-                working for years and unsurprisingly nobody seems to care.
-              </p>
-            </li>
-            <li>
-              <p>
-                Removed obsolete reference to the solaris-dist target.
-              </p>
-            </li>
-            <li>
-              <p>
-                Updated the release instructions for FreeBSD.
-              </p>
-            </li>
-            <li>
-              <p>
-                Removed unfinished release instructions for Amiga OS and
-                HP-UX 11.
-              </p>
-            </li>
-            <li>
-              <p>
-                Added a pointer to the Cygwin Time Machine for getting the
-                last release of Cygwin version 1.5 to use for building
-                Privoxy on Windows.
-              </p>
-            </li>
-            <li>
-              <p>
-                Various typos have been fixed.
-              </p>
-            </li>
-          </ul>
+          <p>On the other hand, other installers don't overwrite existing configuration files, thinking you will want
+          to do that yourself.</p>
         </li>
         <li>
-          <p>
-            Infrastructure improvements:
-          </p>
-          <ul>
-            <li>
-              <p>
-                The website is no longer hosted at SourceForge and can be
-                reached through https now.
-              </p>
-            </li>
-            <li>
-              <p>
-                The mailing lists at SourceForge have been deprecated, you
-                can subscribe to the new ones at: https://lists.privoxy.org/
-              </p>
-            </li>
-            <li>
-              <p>
-                Migrating the remaining services from SourceForge is work in
-                progress (TODO list item #53).
-              </p>
-            </li>
-          </ul>
+          <p>In the default configuration only fatal errors are logged now. You can change that in the <a href=
+          "config.html#DEBUG">debug section</a> of the configuration file. You may also want to enable more verbose
+          logging until you verified that the new <span class="APPLICATION">Privoxy</span> version is working as
+          expected.</p>
         </li>
         <li>
-          <p>
-            Build system improvements:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Add configure argument to optimistically redefine FD_SETSIZE
-                with the intent to change the maximum number of client
-                connections Privoxy can handle. Only works with some libcs.
-                Sponsored by Robert Klemme.
-              </p>
-            </li>
-            <li>
-              <p>
-                Let the tarball-dist target skip files in ".git".
-              </p>
-            </li>
-            <li>
-              <p>
-                Let the tarball-dist target work in cwds other than current.
-              </p>
-            </li>
-            <li>
-              <p>
-                Make the 'clean' target faster when run from a git
-                repository.
-              </p>
-            </li>
-            <li>
-              <p>
-                Include tools in the generic distribution.
-              </p>
-            </li>
-            <li>
-              <p>
-                Let the gen-dist target work in cwds other than current.
-              </p>
-            </li>
-            <li>
-              <p>
-                Sort find output that is used for distribution tarballs to
-                get reproducible results.
-              </p>
-            </li>
-            <li>
-              <p>
-                Don't add '-src' to the name of the tar ball generated by the
-                gen-dist target. The package isn't a source distribution but
-                a binary package. While at it, use a variable for the name to
-                reduce the chances that the various references get out of
-                sync and fix the gen-upload target which was looking in the
-                wrong directory.
-              </p>
-            </li>
-            <li>
-              <p>
-                Add regression-tests.action to the files that are
-                distributed.
-              </p>
-            </li>
-            <li>
-              <p>
-                The gen-dist target which was broken since 2002 (r1.92) has
-                been fixed.
-              </p>
-            </li>
-            <li>
-              <p>
-                Remove genclspec.sh which has been obsolete since 2009.
-              </p>
-            </li>
-            <li>
-              <p>
-                Remove obsolete reference to Redhat spec file.
-              </p>
-            </li>
-            <li>
-              <p>
-                Remove the obsolete announce target which has been commented
-                out years ago.
-              </p>
-            </li>
-            <li>
-              <p>
-                Let rsync skip files if the checksums match.
-              </p>
-            </li>
-          </ul>
-        </li>
-        <li>
-          <p>
-            Privoxy-Regression-Test:
-          </p>
-          <ul>
-            <li>
-              <p>
-                Add a "Default level offset" directive which can be used to
-                change the default level by a given value. This directive
-                affects all tests located after it until the end of the file
-                or a another "Default level offset" directive is reached. The
-                purpose of this directive is to make it more convenient to
-                skip similar tests in a given file without having to remove
-                or disable the tests completely.
-              </p>
-            </li>
-            <li>
-              <p>
-                Let test level 17 depend on FEATURE_64_BIT_TIME_T instead of
-                FEATURE_PTHREAD which has no direct connection to the time_t
-                size.
-              </p>
-            </li>
-            <li>
-              <p>
-                Fix indentation in perldoc examples.
-              </p>
-            </li>
-            <li>
-              <p>
-                Don't overlook directives in the first line of the action
-                file.
-              </p>
-            </li>
-            <li>
-              <p>
-                Bump version to 0.7.
-              </p>
-            </li>
-            <li>
-              <p>
-                Fix detection of the Privoxy version now that https:// is
-                used for the website.
-              </p>
-            </li>
-          </ul>
+          <p>Three other config file settings are now off by default: <a href=
+          "config.html#ENABLE-REMOTE-TOGGLE">enable-remote-toggle</a>, <a href=
+          "config.html#ENABLE-REMOTE-HTTP-TOGGLE">enable-remote-http-toggle</a>, and <a href=
+          "config.html#ENABLE-EDIT-ACTIONS">enable-edit-actions</a>. If you use or want these, you will need to
+          explicitly enable them, and be aware of the security issues involved.</p>
         </li>
       </ul>
-
-      <div class="SECT2">
-        <h2 class="SECT2">
-          <a name="UPGRADERSNOTE">3.1. Note to Upgraders</a>
-        </h2>
-        <p>
-          A quick list of things to be aware of before upgrading from earlier
-          versions of <span class="APPLICATION">Privoxy</span>:
-        </p>
-        <p>
-        </p>
-        <ul>
-          <li>
-            <p>
-              The recommended way to upgrade <span class=
-              "APPLICATION">Privoxy</span> is to backup your old
-              configuration files, install the new ones, verify that <span
-              class="APPLICATION">Privoxy</span> is working correctly and
-              finally merge back your changes using <span class=
-              "APPLICATION">diff</span> and maybe <span class=
-              "APPLICATION">patch</span>.
-            </p>
-            <p>
-              There are a number of new features in each <span class=
-              "APPLICATION">Privoxy</span> release and most of them have to
-              be explicitly enabled in the configuration files. Old
-              configuration files obviously don't do that and due to syntax
-              changes using old configuration files with a new <span class=
-              "APPLICATION">Privoxy</span> isn't always possible anyway.
-            </p>
-          </li>
-          <li>
-            <p>
-              Note that some installers remove earlier versions completely,
-              including configuration files, therefore you should really save
-              any important configuration files!
-            </p>
-          </li>
-          <li>
-            <p>
-              On the other hand, other installers don't overwrite existing
-              configuration files, thinking you will want to do that
-              yourself.
-            </p>
-          </li>
-          <li>
-            <p>
-              In the default configuration only fatal errors are logged now.
-              You can change that in the <a href="config.html#DEBUG">debug
-              section</a> of the configuration file. You may also want to
-              enable more verbose logging until you verified that the new
-              <span class="APPLICATION">Privoxy</span> version is working as
-              expected.
-            </p>
-          </li>
-          <li>
-            <p>
-              Three other config file settings are now off by default: <a
-              href=
-              "config.html#ENABLE-REMOTE-TOGGLE">enable-remote-toggle</a>, <a
-              href=
-              "config.html#ENABLE-REMOTE-HTTP-TOGGLE">enable-remote-http-toggle</a>,
-              and <a href=
-              "config.html#ENABLE-EDIT-ACTIONS">enable-edit-actions</a>. If
-              you use or want these, you will need to explicitly enable them,
-              and be aware of the security issues involved.
-            </p>
-          </li>
-        </ul>
-      </div>
-    </div>
-    <div class="NAVFOOTER">
-      <hr align="LEFT" width="100%">
-      <table summary="Footer navigation table" width="100%" border="0"
-      cellpadding="0" cellspacing="0">
-        <tr>
-          <td width="33%" align="left" valign="top">
-            <a href="installation.html" accesskey="P">Prev</a>
-          </td>
-          <td width="34%" align="center" valign="top">
-            <a href="index.html" accesskey="H">Home</a>
-          </td>
-          <td width="33%" align="right" valign="top">
-            <a href="quickstart.html" accesskey="N">Next</a>
-          </td>
-        </tr>
-        <tr>
-          <td width="33%" align="left" valign="top">
-            Installation
-          </td>
-          <td width="34%" align="center" valign="top">
-            &nbsp;
-          </td>
-          <td width="33%" align="right" valign="top">
-            Quickstart to Using Privoxy
-          </td>
-        </tr>
-      </table>
     </div>
-  </body>
+  </div>
+  <div class="NAVFOOTER">
+    <hr align="left" width="100%">
+    <table summary="Footer navigation table" width="100%" border="0" cellpadding="0" cellspacing="0">
+      <tr>
+        <td width="33%" align="left" valign="top"><a href="installation.html" accesskey="P">Prev</a></td>
+        <td width="34%" align="center" valign="top"><a href="index.html" accesskey="H">Home</a></td>
+        <td width="33%" align="right" valign="top"><a href="quickstart.html" accesskey="N">Next</a></td>
+      </tr>
+      <tr>
+        <td width="33%" align="left" valign="top">Installation</td>
+        <td width="34%" align="center" valign="top">&nbsp;</td>
+        <td width="33%" align="right" valign="top">Quickstart to Using Privoxy</td>
+      </tr>
+    </table>
+  </div>
+</body>
 </html>
-