apache: automatically convert reStructuredText to HTML

ExtFilterDefine rst2html mode=output \
    intype=text/x-rst outtype=text/html \
    EnableEnv=supports_html \
    cmd="/usr/bin/rst2html"
AddType text/x-rst .rst
<FilesMatch "\.rst$">
    SetEnvIf Accept text/html supports_html
    SetOutputFilter rst2html
</FilesMatch>