ref: 7b8bada6b471f4ab2ee12f5a2721ca488fac462f
dir: /sys/lib/python/mercurial/templates/rss/map/
default = 'changelog'
mimetype = 'text/xml; charset={encoding}'
header = header.tmpl
changelog = changelog.tmpl
changelogentry = changelogentry.tmpl
filelog = filelog.tmpl
filelogentry = filelogentry.tmpl
tags = tags.tmpl
tagentry = tagentry.tmpl
error = error.tmpl