templates/rss/header.tmpl

test-convert-darcs: skip if we can't find the elementtree module

This patch is a bit dirty to avoid having to repeat the dance required
to import elementtree.

Content-type: text/xml; charset={encoding}

<?xml version="1.0" encoding="{encoding}"?>
<rss version="2.0">
  <channel>
    <link>{urlbase}{url}</link>
    <language>en-us</language>