Print commit time/date from perspective of committer.
Previously, it was printed in the time zone of the reader, but with
the committer's time zone offset. It is now consistent.
<item>
<title>#desc|firstline|escape#</title>
<link>#url#?cmd=changeset;node=#node#</link>
<description><![CDATA[#desc|escape|addbreaks#]]></description>
<author>#author|obfuscate#</author>
<pubDate>#date|rfc822date#</pubDate>
</item>