officially mark XMLUnit 1.x as unsupported

Author: bodewig

index.html

@@ -164,7 +164,13 @@ <h4>
              href="#about-xmlunit1"
              aria-hidden="true"><span class="octicon octicon-link"></span></a>XMLUnit 1.x</h4>
 
-        <p>XMLUnit for Java 1.x still has its home at <a href="http://sourceforge.net/p/xmlunit">sourceforge</a>, if you want to report bugs, please use the issue tracker <a href="http://sourceforge.net/p/xmlunit/bugs/?source=navbar">over there</a> - any feature request should go against the 2.x version here.</p>
+        <p>XMLUnit for Java 1.x is no longer maintained, the old home
+        has
+        been <a href="http://sourceforge.net/p/xmlunit">sourceforge</a>.
+        If you want to report bugs, please use the github issue
+        tracker but most likely things will only get fixed in the
+        legacy mdule of XMLUnit 2.x. Any feature request should go
+        against the 2.x version here.</p>
 
         <ul>
           <li><a href="http://sourceforge.net/projects/xmlunit/files/xmlunit%20for%20Java/XMLUnit%20for%20Java%201.6/">Source
@@ -192,8 +198,8 @@ <h3>
           welcome.  Please
           see <a href="https://github.com/xmlunit/xmlunit/blob/main/CONTRIBUTING.md">our
           contributing page</a> for details.  In short, we like pull
-          requests, please use github's infrastructure for XMLUnit 2.x
-          and Sourceforge's infrastructure for XMLUnit 1.x.</p>
+          requests, please use github's infrastructure for XMLUnit
+          2.x.</p>
 
         <p>The future of XMLUnit is discussed on
           the <code>xmlunit-general</code> mailing list hosted at <a href="http://sourceforge.net/p/xmlunit/mailman/?source=navbar">Sourceforge</a></p>