Merge r40237 from 2.9 branch:

  Restify document and point to ZPL 2.1 license text.

Merge r40238 from 2.9 branch:
  get rid of ZPL 2.0 license text. ZopePublicLicense.txt is taking over

README.txt

 Welcome to The Zope Source Release
+==================================
 
-  Zope is an open-source web application server.
+Zope is an open-source web application server.
 
-  This document provides some general information about the Zope
-  source release and provides links to other documents.
+This document provides some general information about the Zope source
+release and provides links to other documents.
 
-  Installation information can be found in "doc/INSTALL.txt". Other
-  documentation is also in the "doc" directory and in the Zope.org
-  documentation section at http://www.zope.org/Documentation/.
+Installation information can be found in ``doc/INSTALL.txt``.  Other
+documentation is also in the "doc" directory and in the Zope.org
+documentation section at http://www.zope.org/Documentation/.
 
-  General Zope information is available at http://www.zope.org/
+General Zope information is available at http://www.zope.org/
 
-  Report problems with this release on the Zope mailing list
-  (zope@zope.org) To subscribe to the list send mail to
-  zope-request@zope.org with "subscribe" in the subject line.
+Report problems with this release on the Zope mailing list
+(zope@zope.org) To subscribe to the list send mail to
+zope-request@zope.org with "subscribe" in the subject line.
 
 Introduction
+------------
 
-  The source release is intended for tinkerers, those who want to use
-  Zope components separately, people who want to use their own Python,
-  and people who work on platforms that are not supported by
-  a binary distribution.
+The source release is intended for tinkerers, those who want to use
+Zope components separately, people who want to use their own Python,
+and people who work on platforms that are not supported by a binary
+distribution.
 
 License
+-------
 
-  The Zope License is included in "doc/LICENSE.txt" Send your feedback
-  about the license to zope-license@zope.org.
+The Zope License is included in ``ZopePublicLicense.txt``.  Send your
+feedback about the license to zope-license@zope.org.
 
 Installing Zope
+---------------
 
-  Follow the instructions in "doc/INSTALL.txt" to install Zope.
+Follow the instructions in ``doc/INSTALL.txt`` to install Zope.
 
 Reporting bugs
+--------------
 
-  Bugs reports should be made through the Zope bugtracker at
-  http://collector.zope.org/Zope. A bug report should contain detailed
-  information about how to reproduce the bug, error messages (see /error_log
-  within the ZMI or var/event.log)
-
-
+Bugs reports should be made through the Zope bugtracker at
+http://collector.zope.org/Zope.  A bug report should contain detailed
+information about how to reproduce the bug, error messages (see
+/error_log within the ZMI or var/event.log)

doc/LICENSE.txt

-Zope Public License (ZPL) Version 2.1
-
-A copyright notice accompanies this license document that
-identifies the copyright holders.
-
-This license has been certified as open source. It has also
-been designated as GPL compatible by the Free Software
-Foundation (FSF).
-
-Redistribution and use in source and binary forms, with or
-without modification, are permitted provided that the
-following conditions are met:
-
-1. Redistributions in source code must retain the
-   accompanying copyright notice, this list of conditions,
-   and the following disclaimer.
-
-2. Redistributions in binary form must reproduce the accompanying
-   copyright notice, this list of conditions, and the
-   following disclaimer in the documentation and/or other
-   materials provided with the distribution.
-
-3. Names of the copyright holders must not be used to
-   endorse or promote products derived from this software
-   without prior written permission from the copyright
-   holders.
-
-4. The right to distribute this software or to use it for
-   any purpose does not give you the right to use
-   Servicemarks (sm) or Trademarks (tm) of the copyright
-   holders. Use of them is covered by separate agreement
-   with the copyright holders.
-
-5. If any files are modified, you must cause the modified
-   files to carry prominent notices stating that you changed
-   the files and the date of any change.
-
-Disclaimer
-
-  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS''
-  AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
-  NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
-  AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
-  NO EVENT SHALL THE COPYRIGHT HOLDERS BE
-  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
-  OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
-  DAMAGE.
-