Preserve multibyte UTF-8 characters when obfuscating.
This version uses the unicode 'replace' option, so non-UTF-8
encodings will still be mangled. Luckily, there aren't any
of those.
#header#
<title>#repo|escape# Changelog</title>
<description>#repo|escape# Changelog</description>
#entries%changelogentry#
</channel>
</rss>