A better way to add site-wide ToS link to *all* pages on the site.
getUniversalContext() already fetches a copy of the Site settings, so use that
to see if the site-wide ToS exist and produce a link.
Patch by: Todd Larsen
Review by: to-be-reviewed
# Directions for web crawlers.
# See http://www.robotstxt.org/wc/norobots.html.
User-agent: HTTrack
User-agent: puf
User-agent: MSIECrawler
User-agent: Nutch
Disallow: /