bug 1316610: Avoid indexing empty, dupe docs
bug 1316610: Avoid indexing empty, dupe docs

If a document is empty, or it an untranslated page that is just showing
the English document, then ask the search crawlers not to index it.

a2sheppy/kuma,SphinxKnight/kuma,Elchi3/kuma,Elchi3/kuma,jwhitlock/kuma,jwhitlock/kuma,mozilla/kuma,escattone/kuma,Elchi3/kuma,mozilla/kuma,mozilla/kuma,jwhitlock/kuma,Elchi3/kuma,Elchi3/kuma,SphinxKnight/kuma,SphinxKnight/kuma,a2sheppy/kuma,mozilla/kuma,a2sheppy/kuma,SphinxKnight/kuma,SphinxKnight/kuma,mozilla/kuma,SphinxKnight/kuma,a2sheppy/kuma,a2sheppy/kuma,jwhitlock/kuma,escattone/kuma,escattone/kuma,jwhitlock/kuma