fix bug 1488892: Skip tags in scrape_links
fix bug 1488892: Skip tags in scrape_links

When scraping a page for wiki documents, skip tag links like
/en-US/docs/tag/Foo, which otherwise look like documents.

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