docs: replace redirecting url's with target

Author: rouilj

doc/installation.txt

@@ -2374,7 +2374,7 @@ the test.
 .. _docutils: https://pypi.org/project/docutils/
 .. _flup: https://pypi.org/project/flup/
 .. _gpg: https://www.gnupg.org/software/gpgme/index.html
-.. _jinja2: https://palletsprojects.com/p/jinja/
+.. _jinja2: https://palletsprojects.com/projects/jinja/
 .. _markdown: https://python-markdown.github.io/
 .. _markdown2: https://github.com/trentm/python-markdown2
 .. _mistune: https://pypi.org/project/mistune/

doc/reference.txt

@@ -2299,7 +2299,7 @@ to use ``jinja2`` rather than TAL. A number of trackers are running
 using ``jinja2`` templating so it is less experimental than
 Chameleon templating.
 
-.. _jinja2: https://palletsprojects.com/p/jinja/
+.. _jinja2: https://palletsprojects.com/projects/jinja/
 
 
 **NOTE1**: For historical reasons, examples given below assumes path

doc/sc.txt

@@ -14,7 +14,7 @@ they are referenced here.  All of these were written by Ka-Ping Yee,
 the original architect of Roundup..
 
 A few of the pages have been updated to correct links. However you may
-still have to use the `wayback machine <https://wayback.archive.org>`_
+still have to use the `wayback machine <https://web.archive.org>`_
 to access some of the links on these pages. The papers in
 chronological order are:
 

doc/upgrading.txt

@@ -1863,7 +1863,7 @@ will take longer but may be worth trying if the ``exporttables`` and
 
 Another way that should be faster, but is untested is to use mysql
 dump to dump the database.
-https://makandracards.com/makandra/595-dumping-and-importing-from-to-mysql-in-an-utf-8-safe-way
+https://makandracards.com/makandra/595-dumping-importing-mysql-utf-8-safe-way
 recommends:
 
    Note that when your MySQL server is not set to UTF-8 you need to do

website/issues/html/page.html

@@ -216,9 +216,9 @@ <h1 id="breadcrumb"><span metal:define-slot="body_title">body title</span></h1>
   <p>
     Hosted on <a href="https://m.do.co/c/783434964889" title="Hosted on DigitalOcean">DigitalOcean</a>,
     <br>
-    Supported by <a href="https://python.org/psf-landing/" title="The Python Software Foundation">The Python Software Foundation</a>,
+    Supported by <a href="https://www.python.org/psf-landing/" title="The Python Software Foundation">The Python Software Foundation</a>,
     <br>
-    Powered by <a href="http://roundup.sourceforge.net" title="Powered by the Roundup Issue Tracker">Roundup</a>
+    Powered by <a href="https://roundup.sourceforge.io" title="Powered by the Roundup Issue Tracker">Roundup</a>
   </p>
 </div> <!-- credits -->
 <!-- Created: Wed Jan 14 11:55:38 EST 2009 -->