util: disinfect lookup_reg strings (issue1126)
lookup_reg could return Unicode strings, which would infect other strings and
generate unexpected tracebacks. Spotted by Rémy Roy.
Fold in silly nested function while we're at it.
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