feed: set tagline as subtitle. fixes #2239

inc/Feed/FeedCreator.php

@@ -22,6 +22,7 @@ class FeedCreator
 
         $this->feed = new \UniversalFeedCreator();
         $this->feed->title = $this->options->get('title');
+        $this->feed->description = $this->options->get('subtitle');
         $this->feed->link = DOKU_URL;
         $this->feed->syndicationURL = DOKU_URL . 'feed.php';
         $this->feed->cssStyleSheet = DOKU_URL . 'lib/exe/css.php?s=feed';

inc/Feed/FeedCreatorOptions.php

@@ -98,6 +98,7 @@ class FeedCreatorOptions
         if ($this->options['namespace']) {
             $this->options['title'] .= ' - ' . $this->options['namespace'];
         }
+        $this->options['subtitle'] = $conf['tagline'];
 
         $this->options = array_merge($this->options, $options);