templates/tags-rss.tmpl

load extensions from every hgrc.
before this change only extensions in global hgrc files were loaded.
now extensions in per-repo hgrc are loaded.

#header#
    <title>#repo|escape#: tags </title>
    <description>#repo|escape# tag history</description>
    #entriesnotip%tagentry#
  </channel>
</rss>