ref: 4e91e4a2dbab9d79e1047cfc2094a438561b5a21
dir: /sys/lib/python/mercurial/templates/rss/filelog.tmpl/
{header} <title>{repo|escape}: {file|escape} history</title> <description>{file|escape} revision history</description> {entries%filelogentry} </channel> </rss>