Removed commented property from comment model.
scope_path is set to the commented Work anyway and back references don't work. This means we can also comment on any other linkable.
Patch by: Lennard de Rijk
Reviewed 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: /