hide version notes for 1.x and 2.x from the HTML version

Doc/html/style.css

@@ -99,6 +99,9 @@ div.note                { background-color: #fffaf0;
 div.note .label         { margin-right: 0.5em;
                           font-family: sans-serif; }
 
+.versionnote1           { display: none; }
+.versionnote2           { display: none; }
+
 address                 { font-size: 80%; }
 .release-info           { font-style: italic;
                           font-size: 80%; }

Doc/perl/python.perl

@@ -422,11 +422,15 @@ sub versionnote($$){
     local $_ = $_[1];
     my $explanation = next_optional_argument();
     my $release = next_argument();
+    my $classes = "versionnote";
+    if ($release =~ /^(\d+)\./) {
+        $classes .= " versionnote$1";
+    }
     my $text = "$type in version $release.";
     if ($explanation) {
         $text = "$type in version $release:\n$explanation.";
     }
-    return "\n<span class=\"versionnote\">$text</span>\n" . $_;
+    return "\n<span class=\"$classes\"  \n>$text</span>\n" . $_;
 }
 
 sub do_cmd_versionadded{