List alternate feeds on RSS page

app/templates/feeds/rss.xml.builder

@@ -9,6 +9,18 @@ xml.channel do |channel|
   channel.pubDate Time.now.rfc2822
   channel.ttl 1800
 
+  channel.alternate_feed do |item|
+    item.link "/feeds/rss"
+    item.title "Main feed (this feed)"
+    item.description "The main feed, with all the posts"
+  end
+
+  channel.alternate_feed do |item|
+    item.link "/feeds/statuses_rss"
+    item.title "Statuses / Microblog"
+    item.description "Ony shorter posts, usually also appearing on Mastodon"
+  end
+
   posts.each do |post|
     channel.item do |item|
       item.title post.display_title

app/templates/feeds/statuses_rss.xml.builder

@@ -9,6 +9,18 @@ xml.channel do |channel|
   channel.pubDate Time.now.rfc2822
   channel.ttl 1800
 
+  channel.alternate_feed do |item|
+    item.link "/feeds/rss"
+    item.title "Main feed"
+    item.description "The main feed, with all the posts"
+  end
+
+  channel.alternate_feed do |item|
+    item.link "/feeds/statuses_rss"
+    item.title "Statuses / Microblog (this feed)"
+    item.description "Ony shorter posts, usually also appearing on Mastodon"
+  end
+
   posts.each do |post|
     channel.item do |item|
       item.title post.raw_content

public/assets/style.xslt

@@ -30,6 +30,20 @@
               Visit Website →
             </a>
           </header>
+
+          <h2>Alternate feeds</h2>
+          <xsl:for-each select="/channel/alternate_feed">
+            <div class="pb-5">
+              <a target="_blank">
+                <xsl:attribute name="href">
+                  <xsl:value-of select="link"/>
+                </xsl:attribute>
+                <xsl:value-of select="title"/>
+              </a>
+              <p><xsl:value-of select="description"/></p>
+            </div>
+          </xsl:for-each>
+
           <h2>Recent Items</h2>
           <xsl:for-each select="/channel/item">
             <div class="pb-5">