russian doc - from KOI8-R to missing change.
<!-- Russian -->
<!-- ==================================================================== -->
<property value=".xml.ru" name="inputext.ru"/>
-<property value=".html.ru.koi8-r" name="outputext.ru"/>
+<property value=".html.ru.utf8" name="outputext.ru"/>
<target description="- builds Russian HTML files" name="ru">
<html.generic lang="ru"/>
