Fixed some access related bugs
These were not obvious previously, but with the sidebar not showing
up when one does not have access, they stood out.
# 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: /